def howManyPizzas(students: int, slicesPerStudent: int) -> int:
    """Check how many pizzas are needed given that each pizza has 8 slices."""
    neededSlices = students * slicesPerStudent
    return (neededSlices + 7) // 8


def leftoverPizzaSlices(students: int, slicesPerStudent: int) -> int:
    """Check how many slices of pizza will be leftover given that each pizza has 8 slices."""
    neededSlices = students * slicesPerStudent
    totalSlices = howManyPizzas(students, slicesPerStudent) * 8
    return totalSlices - neededSlices


print("Testing howManyPizzas()...", end="")
assert howManyPizzas(8, 1) == 1
assert howManyPizzas(9, 1) == 2
assert howManyPizzas(5, 4) == 3
assert howManyPizzas(10, 2) == 3
assert howManyPizzas(0, 0) == 0
assert howManyPizzas(0, 3) == 0
assert howManyPizzas(10, 0) == 0
assert howManyPizzas(3, 4) == 2
print("Passed!")

print("Testing leftoverPizzaSlices()...", end="")
assert leftoverPizzaSlices(8, 1) == 0
assert leftoverPizzaSlices(9, 1) == 7
assert leftoverPizzaSlices(5, 4) == 4
assert leftoverPizzaSlices(10, 2) == 4
assert leftoverPizzaSlices(0, 0) == 0
assert leftoverPizzaSlices(0, 3) == 0
assert leftoverPizzaSlices(10, 0) == 0
assert leftoverPizzaSlices(3, 4) == 4
print("Passed!")