To produce a batch of parts, the master alone takes 6 hours, and the apprentice alone takes 10 hours. When the master and apprentice cooperate to complete the task, the master produces 240 more parts than the apprentice. How many parts are there in total?
生产一批零件，师傅单独做要6小时，徒弟单独做要10小时，当师徒合作，完成任务时，师傅比徒弟多生产了240个，这批零件共多少个？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/6) + (1/10)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">1 / (4/15)</gadget>
<output>15/4 = around 3.75</output>

<gadget id="calculator">(1/6) * (15/4)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(1/10) * (15/4)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(5/8) - (3/8)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">240 / (1/4)</gadget>
<output>960</output>

<result>960</result>