大坝king(罗允聪) · 发布于 2026-03-29 · 浏览 154 回复 0

int n, a, b, c, d;
cin >> n;
cout << fixed << setprecision(6);

for (int i=0; i<n; i++) {
    cin >> a >> b >> c >> d;
    cout << 1.0*a*c/b/d << endl;
}
return 0;