piece of cloth is 40 meters long, just enough to make 12 sets of adult clothes and 8 sets of children's clothes. Each set of adult clothes uses 2.4 meters of cloth, how many meters of cloth is used for a set of children's clothes?
一匹布有40米长，正好可以做12套大人衣服和8套小孩衣服．每套大人衣服用布2.4米，问一套小孩衣服用布多少米？
<gadget id="calculator">2.4 * 12</gadget>
<output>28.8</output>

<gadget id="calculator">40 - 28.8</gadget>
<output>11.2</output>

<gadget id="calculator">11.2 / 8</gadget>
<output>1.4</output>

<result>1.4</result>