To build a road, the ratio of the repaired to the unrepaired is 2:3, so what is the total length of the repaired road
修一条路，已修的与未修的比是2：3，那么已修的长度是全长的多少
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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