A bamboo pole is inserted vertically into the river. The part of the bamboo pole that enters the mud is 0.6 meters, and the part above the water surface is 0.7 meters. The depth of the river is 2 meters and 2 decimeters. How long is this bamboo pole in meters?
一根竹竿垂直插入河中，竹竿入泥部分是0.6米，露出水面部分是0.7米，河水深2米2分米，这根竹竿长多少米？
<gadget id="calculator">0.6 + 0.7 + 2.2</gadget>
<output>3.5</output>

<result>3.5</result>