#include<iostream>

using namespace std;

int main() {
    //注意一定要声明为double,不然精度不够会计算出错
    double id[2], cnt[2], e[2], sum[2];
    for (int i = 0; i < 2; i ++ ) {
        cin >> id[i] >> cnt[i] >> e[i];
        sum[i] = cnt[i] * e[i];
    }
    printf("VALOR A PAGAR: R$ %.2lf", sum[0] + sum[1]);


    return 0;
}