C++ Program to find area of pentagon

Program

#include<iostream>
using namespace std;
int main()
{
	int apothem, side;
	float area, area_num;
	cout << "Enter the apothem:\t";
	cin >> apothem;
	cout << "Enter the length of side:\t";
	cin >> side;
	area_num = (5 * side * apothem);
	area = area_num / 2;
	cout << "Area of pentagon: " << area << endl;
}

Output

Enter the apothem:	5
Enter the length of side:	13
Area of pentagon: 162.5