{"version":"1.0","type":"rich","provider_name":"Calcton","provider_url":"https://www.calcton.com","title":"组合排列计算器 - C(n,r)/P(n,r) 精确计算","author_name":"Calcton","author_url":"https://www.calcton.com","width":600,"height":560,"html":"<iframe src=\"https://www.calcton.com/embed/combination\" width=\"600\" height=\"560\" style=\"border:none;max-width:100%;\" loading=\"lazy\" allow=\"clipboard-write\" title=\"组合排列计算器 - C(n,r)/P(n,r) 精确计算 - Calcton\"></iframe>","cache_age":86400}