Left side of equals to must have only one variable

#include<stdio.h>
int main()
{
	int a,b,z;
	printf("Enter the value of a and b");
	scanf("%d%d",&a ,&b);
	//b*a=z; is invalid
	z=a*b; 	
	printf("The value of Z is: %d\n",z);
	return 0 ;
}