A swimming pool is 25m long, 20m wide, and 2m deep. How many tiles are needed to paste the bottom with square tiles with an area of 4dm**2?
一个游泳池，长25m，宽20m，深2m，将底面用面积是4dm**2的正方形瓷砖贴上，需要多少块？
<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<gadget id="calculator">25 * 20 * 25</gadget>
<output>12_500</output>

<result>12_500</result>