The floor of the library is 25 meters long and 12 meters wide. If square floor tiles with a side length of 2 decimeters are used to map the floor of the library, how many such floor tiles are needed?
图书馆的地面长25米，宽12米．若用边长是2分米的正方形地砖谱图书馆地面，需要这样的地砖多少块？
<gadget id="calculator">25 * 12</gadget>
<output>300</output>

<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * (1/5)</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">300 / (1/25)</gadget>
<output>7_500</output>

<result>7_500</result>