A rectangular hall is 25 meters long and 24 meters wide. If square tiles with a side length of 2 decimeters are used to pave the floor, how many such tiles are needed?
一长方形的大厅，长25米，宽24米，如果用边长是2分米的方瓷砖铺地，需要这样的瓷砖多少块．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<gadget id="calculator">25 * 24 * 25</gadget>
<output>15_000</output>

<result>15_000</result>