import math

print(math.pi)            # 3.141592653589793
print(math.e)             # 2.718281828459045
print(math.sin(23))       # -0.8462204041751706

print(math.perm(3))       #  6 permutations
print(math.perm(4))       # 24 permutations
print(math.perm(4, 2))    # 12 permutations


print(math.lcm(120, 42))  # 840 least common multiple
print(math.gcd(120, 42))  #   6 greatest common divisor

