A piece of cloth is 46m long, and it happens to make 8 sets of adult clothes and 9 sets of children's clothes. It is known that each set of adult clothes uses 3.5 meters of cloth, how many meters of cloth is used for each set of children's clothes? (Solution of column equation)
一匹布长46m，正好做了8套成人服装和9套儿童服装，已知成人服装每套用布3.5m，儿童服装每套用布多少米？(列方程解)
<gadget id="calculator">8 * 3.5</gadget>
<output>28</output>

<gadget id="calculator">46 - 28</gadget>
<output>18</output>

<gadget id="calculator">18 / 9</gadget>
<output>2</output>

<result>2</result>