Grandpa was walking by the road, and it took 15 minutes to walk from the first telegraph pole to the sixth telegraph pole. If grandpa walked for 30 minutes, then how many telegraph poles did he walk to?
爷爷在公路旁散步，从第1根电线杆处走到第6根电线杆处共用了15分钟．如果爷爷走了30分钟，那么他走到了第多少根电线杆处．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">15 / 5</gadget>
<output>3</output>

<gadget id="calculator">30 / 3</gadget>
<output>10</output>

<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<result>11</result>