dif.c

#include <stdio.h>

int main(){
    int A;
    int B;
    int C;
    int D;
    int DIFERENCA;

    scanf("%d",&A);

    scanf("%d",&B);

    scanf("%d",&C);

    scanf("%d",&D);

    DIFERENCA = (A * B - C * D);

    printf("DIFERENCA = %d\n", DIFERENCA);
    return 0;

    }