#include <stdio.h>
 
int main(void){
    int num, mul;
    
    printf("Number: ");
    if ( scanf("%d", &num ) != 1 || ! num )
        return 1;
    
    for ( mul = 1; num; num /= 10 )
        mul *= num % 10;
    
    printf("Multiply of digits: %d\n", mul);
    
    return 0;
}