Master Li originally planned to make 336 parts in 8 hours, but he completed the task 1 hour ahead of schedule. How many more parts per hour did Master Li actually make than the original plan?
李师傅原计划8小时做336个零件，结果提前1小时完成任务．李师傅实际比原计划每小时多做多少个零件？
<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">336 / 7</gadget>
<output>48</output>

<gadget id="calculator">336 / 8</gadget>
<output>42</output>

<gadget id="calculator">48 - 42</gadget>
<output>6</output>

<result>6</result>