divmod(4,2) # (2,0)
divmod(8,3) # (2,2)
divmod(10,-3) # (-4, -2)
divmod(-10,-3) # (3, -1)
divmod(-10,3) # (-4, 2)
divmod(1.8,2) # (0.0, 1.8)
divmod(1.8,0.4) # (4.0, 0.19999999999999996)
divmod(5,0.4) # (12.0, 0.19999999999999973)