A factory produces a batch of parts, 500 pieces per day, and it takes 12 days to complete. If the work efficiency is increased by 20%, how many days can it be completed?
某厂生产一批零件，每天做500只，要12天完成．如果工作效率提高20%，几天可以完成？
<gadget id="calculator">500 * 12</gadget>
<output>6_000</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">500 * (1/5)</gadget>
<output>100</output>

<gadget id="calculator">500 + 100</gadget>
<output>600</output>

<gadget id="calculator">6_000 / 600</gadget>
<output>10</output>

<result>10</result>