A clothing store brings in a piece of fabric. If they are all used to make children's clothing, each set uses 2.2 meters, which can just make 600 sets. If all adult costumes are made, each set will use 4.4 meters, how many sets of adult costumes can be made at most?
某服装店运进一匹布料，如果都做儿童服装，每套用2.2米，刚好能做600套．如果都做成人服装，每套要用4.4米，最多能做多少套成人服装？
<gadget id="calculator">2.2 / 4.4</gadget>
<output>0.5</output>

<gadget id="calculator">600 * 0.5</gadget>
<output>300</output>

<result>300</result>