A garment processing factory can make 24 sets of adult clothing with 120 meters of cloth, and 30 sets of children's clothing. How much less cloth is used for each set of children's clothing than adult clothing?
服装加工厂用120米的布可做成人服装24套，如果做儿童服装，可做30套，每套儿童服装比成人服装少用布多少米？
<gadget id="calculator">120 / 24</gadget>
<output>5</output>

<gadget id="calculator">120 / 30</gadget>
<output>4</output>

<gadget id="calculator">5 - 4</gadget>
<output>1</output>

<result>1</result>