10071 - Back to High School Physics

題目敘述：here

程式碼：

          
// 鄒雨笙 UVa Online Judge 2023/10/28
//
// Problem 10071 - Back to High School Physics


#include<iostream>
using namespace std;


int main() {
    int v, t;
    while (cin >> v >> t) {
        cout << 2 * t * v << endl;

    }
    return 0;

}