Area of Circle

The program must accept the radius R of a circle as the input. The program must print the area of the circle with precision upto 2 decimal places.
Note: Use 22.0/7 for PI value. DO NOT use 3.14 for PI.

Example Input/Output:
Input:
5

Output:
78.57

#include <stdio.h>
int main()
{
    int radius;
    scanf("%d", &radius);
    printf("%.2f", (22/7.0) * radius * radius);
    return 0;
}