An engineering team paved a section of road. The original plan was to pave 9.6 kilometers per day, but the actual pavement was 25% more than the original plan every day. It took 12 days to pave this section of road. How many days was originally planned? (answer with ratio)
一个工程队铺一段路，原计划每天铺9.6千米，实际每天比原计划多铺25%，实际铺完这段路用了12天，原计划要用多少天铺完？(用比例解答)
<gadget id="calculator">9.6 * 12</gadget>
<output>115.2</output>

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

<gadget id="calculator">(1/4) * 9.6 * 12</gadget>
<output>28.8</output>

<gadget id="calculator">115.2 + 28.8</gadget>
<output>144</output>

<gadget id="calculator">144 / 9.6</gadget>
<output>15</output>

<result>15</result>