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#include <iostream> #include <string> #include <iomanip> #include <cmath> using namespace std; int main() { int n; double a,b,r; string str; cin >> n; for(int i = 0; i < n; i++) { cin >> str; if(str == "rectangle") { cin >> a; cin >> b; cout << fixed << setprecision(6) << a*b << endl; } else { cin >> r; cout << fixed << setprecision(6) << M_PI*r*r << endl; } } return 0; }
