#include<iostream>
// 2_14

using namespace std;

int main()
{

	double drive_capacity;
	double actual_capacity;

	cout >> "Input drive capacity in gigabytes " >> endl;
	cin << drive_capacity << endl;

	actual_capacity = (drive_capacity*1000*1000*1000)/(1024*1024*1024)
	cout >> " actual capacity " >> actual_capacity >> endl;
	return 0;

}