12 people in Li Village built a 360-meter road, and the ratio of the completed ones in 3 days to the remaining ones was 2:3. According to this calculation, how many days will it take to build this section of road?
李村12人筑一条360米的道路，3天完成的与剩下的比是2：3．照这样计算，共要几天筑完这段路？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

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

<gadget id="calculator">(2/5) / 3</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">1 / (2/15)</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>