def last_dig(a: int, b: int, c: int) -> bool:
    """Determine if last digit of c equals last digit of a * b."""
    # Make list of list digits of a,b,c.
    last_digits = [digit % 10 for digit in [a, b, c, ]]
    # Calculate a*b and find the last digit.
    ab_last_digit = (last_digits[0] * last_digits[1]) % 10
    # Assign last digit of c to variable.
    c_last_digit = last_digits[2]
    # Compare ab_last_digit to c_last_digit and return.
    return ab_last_digit == c_last_digit