Post B2f9ugCznM2xrGp2Qa by zundan@mastodon.zunda.ninja
 (DIR) More posts by zundan@mastodon.zunda.ninja
 (DIR) Post #B2f9ugCznM2xrGp2Qa by zundan@mastodon.zunda.ninja
       2026-01-25T04:30:10Z
       
       0 likes, 0 repeats
       
       円周を測っておっπで割れば直径だよ