#include<iostream.h>

float pole_prost(float c,d)
{
	float pole;
	pole=c*d;
	return pole;
}

int main()
{

	float a,b;
	cout<<"Podaj bok a prostokata";
	cin>>a;
	cout<<"Podaj bok b prostokata";
	cin<<b;
	cout<<pole_prost(a,b);
}