The floor of the classroom is 10 meters long and 8 meters wide. If floor tiles with a side length of 2 decimeters are used to pave the classroom floor, how many such floor tiles are needed?
教室的地面长10米，宽8米，若用边长是2分米的地砖铺教室地面，需要这样的地砖多少块？
<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">8 / (1/25)</gadget>
<output>200</output>

<gadget id="calculator">10 * 200</gadget>
<output>2_000</output>

<result>2_000</result>