OPERATOR PRECEDENCE IN C

#include <stdio.h>
void main()
{
 int a = 20;
 int b = 10;
 int c = 15;
 int d = 5;
 int e;

 e = (a + b) * c / d;                                            // ( 30 * 15 ) / 5
 printf("Value of (a + b) * c / d is : %d\n", e );
 e = ((a + b) * c) / d;                                         // (30 * 15 ) / 5
 printf("Value of ((a + b) * c) / d is : %d\n" , e );
 e = (a + b) * (c / d);                                         // (30) * (15/5)
 printf("Value of (a + b) * (c / d) is : %d\n", e );
 e = a + (b * c) / d;                                            // 20 + (150/5)
 printf("Value of a + (b * c) / d is : %d\n" , e );
 return 0;
}
OUTPUT :
Value of (a + b) * c / d is : 90
Value of ((a + b) * c) / d is : 90
Value of (a + b) * (c / d) is : 90
Value of a + (b * c) / d is : 50