There is a batch of fabrics in the warehouse of the garment factory. If all of them are made into children's clothing, each set will use 2.2 meters, which is just enough to make 400 sets. If they are all made into adult clothing, each set will use 4.4 meters, how many sets can be made?
服装厂的仓库里有一批面料，如果都做儿童服装，每套用2.2米，刚好能做400套．如果都做成人服装，每套要用4.4米，能做多少套？
<gadget id="calculator">2.2 / 4.4</gadget>
<output>0.5</output>

<gadget id="calculator">400 * 0.5</gadget>
<output>200</output>

<result>200</result>