An engineering team wants to pave a road, and 28 kilometers have been paved in the first 2 days. According to this calculation, how many days will it take to pave the remaining 42 kilometers? (Solve with ratio)
某工程队要铺设一条公路，前2天已铺设了28千米，照这样计算，剩下的42千米，还要多少天才能铺完？(用比例解)
<gadget id="calculator">28 / 2</gadget>
<output>14</output>

<gadget id="calculator">42 / 14</gadget>
<output>3</output>

<result>3</result>