#include <stdio.h>
#include <math.h>
int main()
{
	float height = 0;
	float weight = 0;
	scanf("%f %f",&weight,&height);
	float height2 = height / 100.00;
  //因为要保留小数 所以 我们使用float
	printf("%.2f",weight/(height2*height2));
	return 0;
}