#include<bits/stdc++.h>
using namespae std;

int main()
{
	int T;cin>>T;
	double a,b;
	while(T--)
	{
		char c;cin>>c;
		cin>>a>>b;
		if(c=='a')
		{
			cout<<a+b<<"\n";
		}
		else if(c=='b')
		{
			cout<<a-b<<"\n";
		}
		else if(c=='c')
		{
			cout<<a*b<<"\n";
		}
		else if(c=='d')
		{
			printf("%.5lf\n",a/b);
		}
	}
	return 0;
}