Master Wang has to process 120 parts, and after one day of processing, there are still (2/5) of all parts not completed. If the ratio of the number of unfinished parts to the number of completed parts is 2:13, how many parts does Master Wang need to process?
王师傅要加工120个零件，加工一天后还有全部零件的(2/5)没有完成．要使没有完成零件的个数与完成零件的个数的比是2：13，王师傅还要加工多少个零件？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2 + 13</gadget>
<output>15</output>

<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">(2/5) - (2/15)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">120 * (4/15)</gadget>
<output>32</output>

<result>32</result>