Use 80 square decimeters of cloth to make handkerchiefs each with a side length of 4 decimeters, regardless of loss, how many pieces can be made.
用80平方分米的布做每块边长是4分米的手帕，不考虑损耗，可以做成多少块．
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">80 / 16</gadget>
<output>5</output>

<result>5</result>