There are 31.2 meters of cloth, just cut into 8 pieces of adult clothes and 8 pieces of children's clothes. Each adult clothes uses 2.4 meters of cloth, how many meters of cloth does each child wear? (answer in 2 ways)
有31.2米布，正好裁成8件大人衣服和8件童服．每件大人衣服用布2.4米，每件童服用布几米？(用2种方法解答)
<gadget id="calculator">31.2 / 8</gadget>
<output>3.9</output>

<gadget id="calculator">3.9 - 2.4</gadget>
<output>1.5</output>

<result>1.5</result>