The boatman Xiaoqiang used a 5-meter-long bamboo pole to measure the water depth. The part of the bamboo pole above the water was 2 meters, and it was inserted into the mud by 1 meter. What is the depth of the water in meters?
船工小强用一根长5米的竹竿测量水深，竹竿露出水面的部分是2米，插入泥中1米，那么水深为多少米．
<gadget id="calculator">5 - 2 - 1</gadget>
<output>2</output>

<result>2</result>