There is a batch of cloth for children's clothing, each set uses 1.5 meters of cloth, and 200 sets can be made. If it is changed to adult clothing, each set uses 2.5 meters of cloth, how many sets should be made less?
有一批布做儿童服装，每套用布1.5米，可做200套，如果改做成人服装，每套用布2.5米，要少做多少套？
<gadget id="calculator">200 / 2.5</gadget>
<output>80</output>

<gadget id="calculator">1.5 * 80</gadget>
<output>120</output>

<gadget id="calculator">200 - 120</gadget>
<output>80</output>

<result>80</result>