Hope primary school decoration multimedia classroom. It is planned to use square tiles with an area of 9dm**2 to pave the floor, and 1200 tiles are needed. How many square tiles are actually used to pave the floor with an area of 25dm**2? (Answer with proportional knowledge)
希望小学装修多媒体教室．计划用面积为9dm**2的正方形瓷砖铺地，需要1200块，实际用面积为25dm**2的正方形大理石铺地，需要多少块？(用比例知识解答)
<gadget id="calculator">9 * 1_200</gadget>
<output>10_800</output>

<gadget id="calculator">10_800 / 25</gadget>
<output>432</output>

<result>432</result>