Three masters and apprentices process a batch of parts, the master processes 20 more parts than the senior apprentice, the ratio of the number of parts processed by the junior apprentice to the senior apprentice is 4:5, and the ratio of the total number of parts processed by the two apprentices to the master is 6:5 , How many parts does the master process?
师徒三人加工一批零件，师傅比大徒弟多加工零件20个，小徒弟和大徒弟加工零件个数的比是4：5，两个徒弟加工零件的总数与师傅的比是6：5，师傅加工零件多少个？
<gadget id="calculator">5 + 6</gadget>
<output>11</output>

<gadget id="calculator">5 / 11</gadget>
<output>5/11 = around 0.454545</output>

<gadget id="calculator">6 / 11</gadget>
<output>6/11 = around 0.545455</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">(6/11) * (5/9)</gadget>
<output>10/33 = around 0.30303</output>

<gadget id="calculator">(5/11) - (10/33)</gadget>
<output>5/33 = around 0.151515</output>

<gadget id="calculator">20 / (5/33)</gadget>
<output>132</output>

<gadget id="calculator">132 * (5/11)</gadget>
<output>60</output>

<result>60</result>