1200 square meters of fabric can make 400 suits. If each coat uses 1.8 square meters of fabric, how many square meters of fabric is used for each pair of trousers?
1200平方米布料可以做400套西装．如果每件上衣用布料1.8平方米，每条裤子用布料多少平方米？
<gadget id="calculator">1_200 / 400</gadget>
<output>3</output>

<gadget id="calculator">3 - 1.8</gadget>
<output>1.2</output>

<result>1.2</result>