#include <iostream>
float Calc (float A, float B, int Op)
{
    switch (Op){
    case 1:
        return A-B;

        break;
    case 2:
        return A*B;
        break;
    case 3:
        return A/B;
        break;
    default:
        return A+B;
    }
}
float dil (int i)
{
float A, B,n;
int Op;

    {
        for (int j=1; j<=n; j++)
        std::cin>>A>>B>>Op;
    }

     std::cout<<Calc (A, B, Op);
    }

int main()
{
    int n;
    std::cin>>n;
    for (int i=1; i<=n; i++)
    {
        dil(i);
        std::cout << std::endl;
    }
    return 0;
}