#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
int _base = 12, high = 13, a = 6, c = 8;
cout << "area = " << fixed << setprecision(2) << (float)(_base * high) / 2 << endl;
cout << "perimeter = " << _base + a + c << endl;
return 0;
}
/*
run:
area = 78.00
perimeter = 26
*/