The gardeners greened the 1200-meter road. After working for 12 days, they finished the rest (2/3). At this rate, how many days will it take to complete all the greening?
园林工人对1200米的马路进行绿化，工作12天后，完成的是剩下的(2/3)，照这样的速度，完成全部绿化共需多少天？
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

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

<gadget id="calculator">(2/5) / 12</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">1 / (1/30)</gadget>
<output>30</output>

<result>30</result>