#include <stdio.h>

int main()
{
    float radius, diameter, circumference, area, pi=3.14;
    printf("Enter radius:");
    scanf("%f", &radius);
    
    printf("\nDiameter is %.2f\n", radius*2);
    printf("circumference is %.2f\n", 2*radius*pi);
    printf("Area is %.2f\n", pi*radius*radius);
    
    

    return 0;
}