The garment factory plans to make 20 sets of clothes, each with 3 meters of cloth. How many more sets can be made if each set of children's clothing is made with 2 meters of cloth?
服装厂计划做20套衣服，每套用布3米．如果改做每套用布2米的童装，可以比原来多做多少套？
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">20 * (3/2)</gadget>
<output>30</output>

<gadget id="calculator">30 - 20</gadget>
<output>10</output>

<result>10</result>