It is planned to use 10 days to complete a job, but the actual daily work efficiency has increased by 25%. How many days did it actually take?
计划要用10天完成一项工作，实际每天的工作效率提高了25%，实际用了多少天．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(1/10) * (5/4)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / (1/8)</gadget>
<output>8</output>

<result>8</result>