Help me in solving RCPITCP31 problem

help
,
1

My issue

i can’t solve it

My code

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

int main() {

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

    area = pi * radius * radius;

    printf("The Area of the given Circle is:%f\n", area);

}

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