A section of road is 2 kilometers long. It is planned to finish the repair in 10 days. According to this calculation, how much of this road can be repaired in 4 days
一段路长2千米．计划10天修完，照这样计算，4天可以修这条路的多少
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) * 4</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>