To decorate the bedroom of Xiaoming's house, if you use square bricks with a side length of 2dm, you will need 450 pieces. How many square bricks with a side length of 3dm are used instead?
小明家装修卧室，若果用边长为2dm的方砖要用450块．如果改用边长为3dm的方砖，至需要多少块？
<gadget id="calculator">2 * 2 * 450</gadget>
<output>1_800</output>

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

<gadget id="calculator">1_800 / 9</gadget>
<output>200</output>

<result>200</result>