#include <stdio.h>
#include <conio.h>
main()
{
	float a,b,d,c,e;
	printf("Input a :");
	scanf("%f",&a);
	printf("\nInput b :");
	scanf("%f",&b);
	printf("\nInput c :");
	scanf("%f",&c);
	printf("\nInput e :");
	scanf("%f",&e);
	d=a*b*c*e;
	printf("\nResult : %.2f",d);
	printf("\nBy Suphiwan Boonjaeng NO.29");
}