Master Wang produced a batch of parts. The original plan was to produce 40 parts per hour, but it could be completed in 14 hours. The actual hourly increase was 40% higher than the original plan. How many hours did it actually take to complete the task?
王师傅生产一批零件，原计划每小时生产40个，14小时可以完成，实际每小时比原计划提高40%，实际用了几小时完成了任务？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">40 * (7/5)</gadget>
<output>56</output>

<gadget id="calculator">14 / 56</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">40 * (1/4)</gadget>
<output>10</output>

<result>10</result>