Xiao Dingding wants to measure the depth of the river. He inserts a 3-meter-long bamboo pole into the water. The part that enters the mud is 0.6 meters, and the part that is out of the water is 1.25 meters. How deep is the river in meters?
小丁丁要测量河水的深度，他把一根3米长的竹竿直插入水中，入泥部分是0.6米，露出水面的部分是1.25米，河水的深度是多少米？
<gadget id="calculator">3 - 0.6 - 1.25</gadget>
<output>1.15</output>

<result>1.15</result>