Uncle Zhang used a 5-meter-long bamboo pole to measure the depth of the water in his fish pond. After the bamboo pole was inserted into the water, the part that entered the soil was 0.8 meters, and the surface was 1.36 meters. What is the depth of the fish pond?
张大伯用5米长的竹竿测量自家鱼塘水的深度，竹竿插入水中后，进入泥土部分是0.8米，露出水面是1.36米，鱼塘水深多少？
<gadget id="calculator">5 - 0.8 - 1.36</gadget>
<output>2.84</output>

<result>2.84</result>