It was originally planned to take 10 days to complete a project, but the actual daily work efficiency increased by 25%, how many days can actually be used to complete the project.
完成一项工程，原计划要10天，实际每天工作效率提高25%，实际用多少天可以完成这项工程．
<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>