Use 400 square decimeters of cloth to make each handkerchief of 400 square centimeters, how many pieces can be made at most.
用400平方分米的布做每块400平方厘米的手帕，最多可以做多少块．
<gadget id="calculator">400 * 100</gadget>
<output>40_000</output>

<gadget id="calculator">40_000 / 400</gadget>
<output>100</output>

<result>100</result>