For a batch of parts, the master needs 12 hours to complete the processing alone, and the apprentice processes 16 parts per hour. Now the two masters and apprentices are processing at the same time, and the task is completed in 8 hours. How many parts are there in this batch?
一批零件，师傅单独加工需要12小时完成，徒弟每小时加工16个．现师徒两人同时加工，8小时完成任务．这批零件共有多少个？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/8) - (1/12)</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">16 / (1/24)</gadget>
<output>384</output>

<result>384</result>