A bamboo pole is erected in the lake. The total length of the bamboo pole is 4.8 meters, and the part exposed to the water is 2.6 meters long. How many meters is the water depth?
在湖水里竖着一根竹竿，竹竿全长4.8米，露在水外的部分长2.6米，水深多少米．
<gadget id="calculator">4.8 - 2.6</gadget>
<output>2.2</output>

<result>2.2</result>