Use an 8.5-meter-long bamboo pole to measure the water depth of the pond. Insert the bamboo pole into the bottom of the water and then take it out. The wet part is 2.5 meters longer than the dry part. How many meters is the water depth of the pond?
用一根8.5米长的竹竿测量池塘的水深，将竹竿插到水底后再拿出，湿的部分比干的部分长2.5米，池塘的水深是多少米？
<gadget id="calculator">8.5 + 2.5</gadget>
<output>11</output>

<gadget id="calculator">11 / 2</gadget>
<output>11/2 = around 5.5</output>

<result>11/2 = around 5.5</result>