If a batch of parts is processed, (1/10) of the total amount will be completed in 5 days. How many days will it take to complete all parts?
加工一批零件，5天正好完成总量的(1/10)，全部完工需要多少天．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

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

<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<result>50</result>