To build a road of 5.6 kilometers, 0.6 kilometers per day for the first 4 days, and 0.8 kilometers per day for the rest, how many days did it take to complete the road?
修一条5.6千米的路，前4天每天修0.6千米，剩下的每天修0.8千米，修完这条路共用了多少天？
<gadget id="calculator">0.6 * 4</gadget>
<output>2.4</output>

<gadget id="calculator">5.6 - 2.4</gadget>
<output>3.2</output>

<gadget id="calculator">3.2 / 0.8</gadget>
<output>4</output>

<gadget id="calculator">4 + 4</gadget>
<output>8</output>

<result>8</result>