An old man walks on the road at a constant speed. It takes 12 minutes to walk from the first telegraph pole to the twelfth pole. If the old man walks 24 minutes, which pole should he go to?
一个老人以等速在公路上散步，从第一根电线杆走到第12根用了12分，这个老人如果走24分，应走到第几根？
<gadget id="calculator">24 / 12</gadget>
<output>2</output>

<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<gadget id="calculator">2 * 11</gadget>
<output>22</output>

<gadget id="calculator">22 + 1</gadget>
<output>23</output>

<result>23</result>