URI Online Judge Solution | 1002 Area of a Circle

Problem Link:https://www.urionlinejudge.com.br/judge/en/problems/view/1002
You have to work here with double %lf because if you use float %f for floating point values then it will never give you the accurate answer given in the question output and atlast don’t forget to give newline/endline in the output line otherwise it will show you presentation error.