A bamboo pole is 5.7 meters long, inserted 2.8 meters into the mud, and 1.4 meters out of the water. How deep is the water in meters?
一根竹竿长5.7米，插入泥中2.8米，露出水面1.4米．水深多少米？
<gadget id="calculator">5.7 - 2.8 - 1.4</gadget>
<output>1.5</output>

<result>1.5</result>