Help me in solving PPSC68 problem

My issue

Not getting the answer of this question

My code

#include <stdio.h>

int main(void) {
	// your code goes here
	int a=15, b=35;
	
	if((a%7 && b%5) == 0){
	    printf("The number is divisible by both 5 & 7");
	}else{
	    printf("The number is not divisible by both 5 & 7");
	}

}


Learning course: CSEIPFOIA: Programming and Problem Solving
Problem Link: And Statement Practice Problem in CSEIPFOIA: Programming and Problem Solving - CodeChef