Help me in solving RCPITCP31 problem

help
,
1

My issue

The question

My code

// Complete the code by updating the uderscores(__)
#include <stdio.h>

int main() {

  double pi = 3.14;
  double radius = 8.9;
  area  circle = pi * radius * radius;

  printf("The Area of the given Circle is 3.14 * 8.9 *8.9");
  
}

Learning course: Learn C Programming
Problem Link: https://www.codechef.com/learn/course/rcpit-programming-c/RCPITLPC05/problems/RCPITCP31