{"type":"rich","version":"1.0","title":"s = 10 ⇒ R = 2.48000646617","html":"<iframe src=\"https://www.desmos.com/calculator/rmjyq1s00z?embed\" width=\"500px\" height=\"500px\" style=\"border: 1px solid #ccc\" frameborder=0></iframe>","width":500,"height":500}