A road is 2.4 kilometers long, and the rest is 0.6 kilometers longer than half of the repaired road. What is the total length of this road?
一条公路修好2.4千米，剩下的比修好的一半多0.6千米，这条公路全长多少？
<gadget id="calculator">2.4 / 2</gadget>
<output>1.2</output>

<gadget id="calculator">1.2 + 0.6 + 2.4</gadget>
<output>4.2</output>

<result>4.2</result>