Put a 3m long bamboo pole vertically into the pool, the part of the bamboo pole entering the mud is 0.27m, and the part above the water surface is 0.89m. How deep is the water in the pool?
把一根长3m的竹竿垂直放入水池中，竹竿入泥部分是0.27m，露出水面0.89m．水池中的水深多少米？
<gadget id="calculator">3 - 0.27 - 0.89</gadget>
<output>1.84</output>

<result>1.84</result>