The fourth grade originally planned to plant 25 trees every day, and the task could be completed in 12 days. In fact, 30 trees are planted every day. How many days can the task be completed?
四年级原计划每天栽25棵树，12天可以完成任务．实际每天栽树30棵，多少天可以完成任务呢？
<gadget id="calculator">12 / 30</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">25 * (2/5)</gadget>
<output>10</output>

<result>10</result>