An engineering team paved a section of railway. The original plan was to pave 2.4km per day, but the actual pavement was 25% more than the original plan every day, and it took 16 days to actually pave this section of road. How many days did you plan to take to finish?
一支工程队铺一段铁路，原计划每天铺2.4km，实际每天比原计划多铺25%，实际铺完这段路用16天．原计划用多少天才能铺完？
<gadget id="calculator">2.4 * 16</gadget>
<output>38.4</output>

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

<gadget id="calculator">2.4 * 16 * (1/4)</gadget>
<output>9.6</output>

<gadget id="calculator">38.4 + 9.6</gadget>
<output>48</output>

<gadget id="calculator">48 / 2.4</gadget>
<output>20</output>

<result>20</result>