#include <stdio.h>
#include <conio.h>
main()
{
	printf("----------program by. Yupharet No.23----------");
	float a,b,c,d,e;
	printf("\ninput a :");
	scanf("%f",&a);
	printf("\ninput b : ");
	scanf("%f",&b);
	printf("\ninput c : ");
	scanf("%f",&c);
	printf("\ninput d : ");
	scanf("%f",&d);
	e=a*(b+c)*d
	printf("\nResult : %.1f",e);
}