"""
출처:프로그래머스,
https://school.programmers.co.kr/learn/courses/30/lessons/62048
"""
# 풀이 과정

def solution(w, h):
    result = 0

    if w == 1 or h == 1:
        return 0

    if h < w:
        for k in range(h):
            result += int((k * w / h))
    elif h == w:
        for k in range(w):
            return w * h - w
    else:
        for k in range(w):
            result += int(k * h / w)

    return result * 2