Write a function to convert radians to degrees.
import math
def degree_radian(radian):
 degree = radian*(180/math.pi)
 return degree
<s>[INST]<<SYS>>Given a task and its code, generate test cases for the code.<</SYS>>Write a function to convert radians to degrees.
import math
def degree_radian(radian):
 degree = radian*(180/math.pi)
 return degree[/INST]assert degree_radian(90)==5156.620156177409
assert degree_radian(60)==3437.746770784939
assert degree_radian(120)==6875.493541569878</s>