The master and the apprentice work together to process a batch of parts. 240 parts have been processed, and there are still (3/5) left unprocessed. How many parts are there in total?
师徒两人共同加工一批零件，已经加工了240个，还剩下(3/5)没加工，这批零件一共多少个？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">240 / (2/5)</gadget>
<output>600</output>

<result>600</result>