road construction team paved a road. The original plan was to pave 1.6 kilometers per day, and the paving was completed in 30 days. The actual pavement was 0.8 kilometers more than the original plan per day. How many days was it actually completed? (Solve with ratio)
一个筑路队铺一条公路，原计划每天铺1.6千米，30天铺完，实际每天比原计划多铺0.8千米，实际多少天完成？(用比例解)
<gadget id="calculator">1.6 * 30</gadget>
<output>48</output>

<gadget id="calculator">1.6 + 0.8</gadget>
<output>2.4</output>

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

<result>20</result>