The master and the apprentice produced a batch of machine parts at the same time, and it took 6 hours to complete. The master produced 336 pieces, and the apprentice produced 288. On average, how many pieces did the master produce more than the apprentice per hour?
师徒二人同时生产一批机器零件，6小时完成，师傅生产了336个，徒弟生产了288个，平均每小时师傅比徒弟多生产多少个？
<gadget id="calculator">336 / 6</gadget>
<output>56</output>

<gadget id="calculator">288 / 6</gadget>
<output>48</output>

<gadget id="calculator">56 - 48</gadget>
<output>8</output>

<result>8</result>