import math
print("math.log(10.13) : ", math.log(10.13, 3))
print("math.log(10.81) : ", math.log(10.81, 3))
print("math.log(math.pi) : ", math.log(math.pi, 2))
'''
run:
math.log(10.13) : 2.1076601291869435
math.log(10.81) : 2.166798657001238
math.log(math.pi) : 1.651496129472319
'''