The garment factory buys back a batch of cloth, which can be processed into 50 coats or 240 pairs of trousers. After processing 20 coats, how many pairs of trousers can be processed with the remaining cloth?
服装厂买回一批布，可以加工成50件上衣或240条裤子．当加工20件上衣后，剩下的布还可以加工多少条裤子？
<gadget id="calculator">1 / 50</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">(1/50) * 20</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 240</gadget>
<output>1/240 = around 0.004167</output>

<gadget id="calculator">(3/5) / (1/240)</gadget>
<output>144</output>

<result>144</result>