Xiang Qi inserted a 5-meter-long fishing rod vertically into the sightseeing lake in Zhongshan Park. The part of the bamboo rod that entered the mud was 0.56 meters, and the part exposed to the water was 2.37 meters. How deep is this sightseeing lake?
向琦把一根5米长的钓鱼竿垂直插入中山公园的观光湖中，竹竿的入泥部分是0.56米、露出水面的部分是2.37米，这个观光湖水深多少米？
<gadget id="calculator">5 - 0.56 - 2.37</gadget>
<output>2.07</output>

<result>2.07</result>