clothing factory used to make a set of children's clothing with 2.2 meters of cloth. After improving the method, each set uses less than 0.2 meters of cloth. It used to make 400 sets of children's clothing. How many sets can it make now?
一服装厂原来做一套童装用布2.2米，改进方法后每套少用0.2米布，原来做400套儿童服装的布，现在可做多少套？
<gadget id="calculator">400 * 2.2</gadget>
<output>880</output>

<gadget id="calculator">2.2 - 0.2</gadget>
<output>2</output>

<gadget id="calculator">880 / 2</gadget>
<output>440</output>

<result>440</result>