A bamboo pole with a length of 134 cm is inserted into the bottom of the water. The bamboo pole is partially wet, and then the bamboo pole is turned upside down and inserted into the bottom of the water. At this time, the wet part of the bamboo pole is 13 cm longer than half of it. What is the depth of the water in centimeters.
将一根长134厘米的竹竿插入水底，竹竿湿了一部分，然后将竹竿倒过来再插入水底，这时，竹竿湿的部分比它的一半长13厘米．则水深多少厘米．
<gadget id="calculator">134 / 2</gadget>
<output>67</output>

<gadget id="calculator">67 + 13</gadget>
<output>80</output>

<gadget id="calculator">80 / 2</gadget>
<output>40</output>

<result>40</result>