The classroom is 8 meters long, 7 meters wide, and 3 meters high. If the classroom floor is paved with floor tiles with a side length of 50 cm and a thickness of 1 cm, at least how many tiles are needed.
教室长8米，宽7米，高3米．如果给教室地面铺上边长是50厘米、厚1厘米的地砖，至少需要多少块．
<gadget id="calculator">10_000 / 2_500</gadget>
<output>4</output>

<gadget id="calculator">8 * 7 * 4</gadget>
<output>224</output>

<result>224</result>