If you use square bricks with a side length of 30cm to pave a room, you need 100 yuan. If you use square bricks with a side length of 50cm instead, how many pieces are needed?
如果用边长30cm的方砖给一个房间铺地，需100块．如果改用边长50cm的方砖铺地，需要多少块？
<gadget id="calculator">30 * 30 * 100</gadget>
<output>90_000</output>

<gadget id="calculator">50 * 50</gadget>
<output>2_500</output>

<gadget id="calculator">90_000 / 2_500</gadget>
<output>36</output>

<result>36</result>