C++ 代码

#include<iostream>
#include<cstdio>
using namespace std;
int main(){
    int t,s;
    double h;
    scanf("%d%d",&t,&s);
    h=static_cast<double>(s)*static_cast<double>(t)/12;
    printf("%.3lf",h);
    return 0;
}

C++ 代码 直接设置double类型

#include<iostream>
#include<cstdio>
using namespace std;
int main(){
    double t,s,h;
    scanf("%lf%lf",&t,&s);
    h=s*t/12;
    printf("%.3lf",h);
    return 0;
}