问题描述:
Write a function to find the lateral surface area of a cylinder.

测试用例:
['assert lateralsuface_cylinder(10,5)==314.15000000000003', 'assert lateralsuface_cylinder(4,5)==125.66000000000001', 'assert lateralsuface_cylinder(4,10)==251.32000000000002']

生成的代码:
import math

def lateralsuface_cylinder(radius, height):
    return 2 * math.pi * radius * height