import math
x = 3.86356
math.floor(x)
#Returns: 3
math.ceil(x)
#Returns: 4
def floor(k,b):
return b-k%b+k-b
print(floor(3,10)) # Prints: 0
print(floor(7.94,2.125)) # Prints: 6.375
math.floor(-23.11) : -24.0
math.floor(300.16) : 300.0
math.floor(300.72) : 300.0