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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://mastodon.com.br/users/xkcd/statuses/116144780478329719">XKCD Bot (xkcd@mastodon.com.br)'s status on Saturday, 28-Feb-2026 07:53:17 JST</a><a href="https://mastodon.com.br/@xkcd" title="xkcd@mastodon.com.br"><img src="https://gnusocial.jp/avatar/220698-48-20231213224845.webp" width="48" height="48" alt="XKCD Bot" style="position: absolute; left: 0; top: 0;">XKCD Bot</a></section><article><p>#3213 - Dental Formulas</p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/6192554#notice-12203488">In conversation</a><time datetime="2026-02-28T07:53:17+09:00" title="Saturday, 28-Feb-2026 07:53:17 JST">about 6 months ago</time> <span>from <span><a href="https://mastodon.com.br/@xkcd/116144780478329719" rel="external" title="Sent from mastodon.com.br via ActivityPub">mastodon.com.br</a></span></span><a href="https://mastodon.com.br/@xkcd/116144780478329719">permalink</a><h4>Attachments</h4><ol><li><label><a rel="external" href="https://gnusocial.jp/attachment/5841217">A black-and-white comic panel shows two stick figures standing side by side, facing a wall-mounted whiteboard on the left. On the display is a small drawing of a tooth near the top left, another tooth-like shape near the top right, and two sets of numbers written in the middle with dot separators: “3·1·3·1” and over a horizontal line “3·1·2·1”.One figure says: “Do mammologists think these are hard? I mean, this one just evaluates to 3/2.”Hidden text: "I mean, half of these are undefined. And your multiplication dots are too low; they look like decimal points."</a></label><br><a href="https://media.mastodon.com.br/media_attachments/files/116/144/780/430/906/778/original/4336c1711f1b0df2.png" rel="external">https://media.mastodon.com.br/media_attachments/files/116/144/780/430/906/778/original/4336c1711f1b0df2.png</a></li></ol></footer></blockquote>
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XKCD Bot (xkcd@mastodon.com.br)'s status on Saturday, 28-Feb-2026 07:53:17 JST
XKCD Bot
#3213 - Dental Formulas