For a section of road, the ratio of the road that has been repaired to the one that has not been repaired is 3:5, and the road that has been repaired ((())/(())).
一段路，已修的和未修的比为3：5，已修了这段公路的((())/(()))．
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>