The master and the apprentice produce a total of several parts, and the parts produced by the apprentice account for 3/8 of the total number of parts. If the apprentice gives the master 20 parts, the ratio of the number of parts between the apprentice and the master is 1:3. How many parts does the apprentice produce? ?
师徒二人共生产零件若干个，徒弟生产的零件占零件总数的(3/8)，若徒弟给师傅20个，则徒弟于师傅的零件个数比是1：3，徒弟生产零件多少个？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/8) - (1/4)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">20 / (1/8)</gadget>
<output>160</output>

<gadget id="calculator">160 * (3/8)</gadget>
<output>60</output>

<result>60</result>