room needs to use 180 pieces of floor tiles with a side length of 2 decimeters. If you use floor tiles with a side length of 3 decimeters instead, how many tiles are needed?
一个房间，用边长2分米的地砖铺地，需要用180块．如果改用边长为3分米的地砖铺地，需要多少块？
<gadget id="calculator">2 * 2 * 180</gadget>
<output>720</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">720 / 9</gadget>
<output>80</output>

<result>80</result>