#include <bits/stdc++.h>

using namespace std;

int main()
{
    float a, b;

    char c; 

    cin >> a >> c >> b;

    if (c == '+')
    {
        cout << fixed << setprecision(2) << a + b;
    }
    else if (c == '-')
    {
        cout << fixed << setprecision(2) << a - b;
    }
    else if (c == '*')
    {
        cout << fixed << setprecision(2) << a * b;
    }
    else if (c == '/')
    {
        if (b != 0)
        {
            cout << fixed << setprecision(2) << a / b;
        }
        else
        {
            cout << "No Answer.";
        }
    }

    return 0;
}

#include <iostream>
#include <stdio.h>
#include <iomanip>
#include <math.h>
using namespace std;
const int N = 1e6 + 10;
const int INF = 0x3f3f3f3f;
int main()
{
	double a , b;
	char c;
	cin >> a >> c >> b;
	if( c == '+' )
	{
		cout << fixed << setprecision(2) << a + b;
	}
	else if( c == '-' )
	{
		cout << fixed << setprecision(2) << a - b;
	}
	else if( c == '*' )
	{
		cout << fixed << setprecision(2) << a * b;
	}
	else if( c == '/' )
	{
		if( b == 0 )
		{
			cout << "No Answer.";
		}
		else
		{
			cout << fixed << setprecision(2) << a / b;
		}
	}
	else
	{
		cout << "No Answer.";
	}
	return 0;
}

#include<iostream> #include<iomanip> using namespace std; int main(){

while (true) { int n; double a,b,c; char f; cout<"请输入你要保留的小数位数:"; cin>n;

cout<<endl<<"请输入算式:";
cin>>a>>f>>b;
if(f=='+'){
	c=a+b;
}
if(f=='-'){
	c=a-b;
}else if(f=='*'){
	c=a*b;
}else if(f=='/'){
	c=a/b;
}
cout<<fixed<<setprecision(n)<<c<<endl<<"——————————————————————————————————————————"<<endl;

} }

#include <iostream> #include <iomanip> using namespace std; int main() { float a, b; char c; cin >> a >> c >> b; if (c == '+') { cout << fixed << setprecision(2) << a + b; } else if (c == '-') { cout << fixed << setprecision(2) << a - b; } else if (c == '*') { cout << fixed << setprecision(2) << a * b; } else if (c == '/') { if (b != 0) { cout << fixed << setprecision(2) << a / b; } else { cout << "No Answer."; } } else { cout << "No Answer."; } return 0; }

#include <bits/stdc++.h>
#include <iostream>
#include <stdio.h>
#include <iomanip>
#include <math.h>
using namespace std;
const int N = 1e6 + 10;
const int INF = 0x3f3f3f3f;
int main()
{
	double a , b;
	char c;
	cin >> a >> c >> b;
	if( c == '+' )
	{
		cout << fixed << setprecision(2) << a + b;
	}
	else if( c == '-' )
	{
		cout << fixed << setprecision(2) << a - b;
	}
	else if( c == '*' )
	{
		cout << fixed << setprecision(2) << a * b;
	}
	else if( c == '/' )
	{
		if( b == 0 )
		{
			cout << "No Answer.";
		}
		else
		{
			cout << fixed << setprecision(2) << a / b;
		}
	}
	else
	{
		cout << "No Answer.";
	}
	return 0;
}

#include<bits/stdc++.h> using namespace std; int main() { double a,b; char c; cin>>a>>c>>b; if(c=='+') cout<<fixed<<setprecision(2)<<a+b; else if(c=='-') cout<<fixed<<setprecision(2)<<a-b; else if(c=='') cout<<fixed<<setprecision(2)<<ab; else if(c=='/') if(b==0) cout<<"No Answer."; else cout<<fixed<<setprecision(2)<<a/b; else cout<<"No Answer."; return 0; }

#include <iostream>
#include <iomanip>
using namespace std;
char a[5];
int main(){
    long double n,m;
    cin>>n>>a[0]>>m;
    if(a[0]=='+')
        cout<<fixed<<setprecision(2)<<n+m;
    else if(a[0]=='-')
        cout<<fixed<<setprecision(2)<<n-m;
    else if(a[0]=='*')
        cout<<fixed<<setprecision(2)<<n*m;
    else{
        if(m==0){
            cout<<"No Answer.";
            return 0;
        }
        cout<<fixed<<setprecision(2)<<n/m;
    }
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main(){
	double a,c;
	char b;
	cin>>a>>b>>c;
	if(b=='+'){
        cout<<fixed<<setprecision(2)<<a+c;
	}
	else if(b=='-'){
        cout<<fixed<<setprecision(2)<<a-c;
	}
	else if(b=='*'){
        cout<<fixed<<setprecision(2)<<a*c;
	}
	else if(b=='/'){
		if(c!=0)
        	cout<<fixed<<setprecision(2)<<a/c;
		else
			cout<<"No Answer.";
	}else{
		cout<<"No Answer.";
	}
}

/*****************************************
备注：
******************************************/
#include <queue>
#include <math.h>
#include <stack>
#include <stdio.h>
#include <iostream>
#include <vector>
#include <iomanip>
#include <string.h>
#include <algorithm>
using namespace std;
#define LL long long
const int N = 1e5 + 10;
const int INF = 0x3f3f3f3f;
int main()
{
	double a,b;
	char c;
	cin >> a >> c >> b;
	double d;
	if(c == '+')
		d = a + b;
	else if(c == '-')
		d = a-b;
	else if(c == '*')
		d = a*b;
	else 
	{
		if(b == 0)
		{
			cout << "No Answer.";
			return 0;
		}
		else
			d = a/b;
	}
	printf("%.2lf\n",d);
	return 0;
}

/*****************************************
备注：
******************************************/
#include <queue>
#include <math.h>
#include <stack>
#include <stdio.h>
#include <iostream>
#include <vector>
#include <iomanip>
#include <string.h>
#include <algorithm>
using namespace std;
#define LL long long
const int N = 1e5 + 10;
const int INF = 0x3f3f3f3f;
int main()
{
	double a,b;
	char c;
	cin >> a >> c >> b;
	double d;
	if(c == '+')
		d = a + b;
	else if(c == '-')
		d = a-b;
	else if(c == '*')
		d = a*b;
	else 
	{
		if(b == 0)
			cout << "No Answer.";
		else
			d = a/b;
	}
	if( !( b == 0 && c == '/'))
		printf("%.2lf\n",d);
	return 0;
}