The master and the apprentice process a batch of trousers. The task of the master is the task of the apprentice (3/2). The master processes 10 pairs a day, and the apprentice processes 5 pairs a day. When the master finishes, the apprentice has 20 pairs left. How many pairs of pants to process?
师徒两人加工一批裤子，师傅的任务是徒弟任务的(3/2)，师傅每天加工10条，徒弟每天加工5条，当师傅完成时，徒弟还剩20条，师徒两人一共要加工多少条裤子？
<gadget id="calculator">10 - 5</gadget>
<output>5</output>

<gadget id="calculator">10 + 5</gadget>
<output>15</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">10 / (3/2)</gadget>
<output>20/3 = around 6.666667</output>

<gadget id="calculator">(20/3) - 5</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">20 / (5/3)</gadget>
<output>12</output>

<gadget id="calculator">15 * 12</gadget>
<output>180</output>

<gadget id="calculator">180 + 20</gadget>
<output>200</output>

<result>200</result>