The road construction team builds a section of road, and it takes 6 people to complete it in 45 days. If 9 people are added, how many days will it be completed?
筑路队，修一段路，6个人45天完成，如果增加9人，多少天完成．
<gadget id="calculator">6 + 9</gadget>
<output>15</output>

<gadget id="calculator">45 / 15</gadget>
<output>3</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>