An engineering team plans to use 30 people to complete a section of road in 42 days. Now add 6 people, and each person's daily work efficiency will increase by 25%, so how many days will it take to complete this batch of tasks?
某工程队计划用30人，42天修完一段路程．现在增加6人，每人每天的工作效率提高25%，那么完成这批任务要多少天？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">30 * (1/4)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">6 * (1/4)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">30 + (15/2) + 6 + (3/2)</gadget>
<output>45</output>

<gadget id="calculator">42 / 45</gadget>
<output>14/15 = around 0.933333</output>

<gadget id="calculator">30 * (14/15)</gadget>
<output>28</output>

<result>28</result>