5/9 is 0, therefore -33 * 0 is -0 (-33 coming from -1 - 32, if the input minus 32 was ≥ 0, then you would end up with 0 instead)

Integer division and floating point division will not produce the same results: the former will give you the quotient. 5 and 9 are integers, so the operation has to output an integer – it can’t produce 0.55555… because that isn’t an integer. You need to specify that numbers used in the division are not integers