{"type":"rich","version":"1.0","title":"带变量的表达式求值","description":"求代数表达式的值，其中包含单步和两步运算","author_name":"Padlet Arcade","thumbnail_url":"https://arcade.padlet.com/open-graph/social-preview-image.png?timestamp=1780949385279&hashid=kGpzG08AKv","html":"<iframe src=\"https://arcade.padlet.com/embed/kGpzG08AKv\" width=\"720\" height=\"480\" frameborder=\"0\" allowfullscreen></iframe>","width":720,"height":480,"provider_name":"Padlet Arcade","provider_url":"https://arcade.padlet.com"}