#B. 圆锥体积

    Type: Default 1000ms 256MiB

圆锥体积

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Background

Special for beginners, ^_^

Description

已知圆锥 体积公式 V=πr2h/3 V= {\pi r^2h} / 3

输入 rrhh ,计算 VV , 答案保留两位小数。

π 取3.14计算。

Format

Input

两个不超过10万的 正整数 r 和 h 。

Output

答案

Samples

1 1
1.05

Limitation

1s, 1024KiB for each test case.

22年秋季 初一上期末考

Not Attended
Status
Done
Rule
OI
Problem
4
Start at
2022-12-26 14:30
End at
2022-12-26 16:30
Duration
2 hour(s)
Host
Partic.
100