Use 80 square decimeters of cloth to make handkerchiefs each with an area of 40 square centimeters, regardless of loss, how many pieces can be made.
用80平方分米的布做每块面积是40平方厘米的手帕，不考虑损耗，可以做成多少块．
<gadget id="calculator">80 * 100</gadget>
<output>8_000</output>

<gadget id="calculator">8_000 / 40</gadget>
<output>200</output>

<result>200</result>