A little monkey climbs up a pole and climbs up 3 meters at a time, but then slides down 1 meter. This bamboo pole is 11 meters high. How many times does it take to climb to the top of the pole?
小猴爬竿，每次向上爬3米，但又向下滑1米，这根竹竿高11米，需要爬几次才能爬到竿顶？
<gadget id="calculator">11 - 3</gadget>
<output>8</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<result>5</result>