A person walks on the path at the same speed. It takes 18 minutes to walk from the first tree to the 13th tree. If the person walks 24 minutes, which tree should he go to?
一个人以相同的速度在小路上散步，从第1棵树走到第13棵树用了18分，如果这个人走了24分，应走到第几棵树？
<gadget id="calculator">13 - 1</gadget>
<output>12</output>

<gadget id="calculator">18 / 12</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">24 / (3/2)</gadget>
<output>16</output>

<gadget id="calculator">16 + 1</gadget>
<output>17</output>

<result>17</result>