Measure the depth of water storage in the pool. Insert a 6-meter-long bamboo pole into the water, 1.42 meters out of the water, and 0.3 meters into the mud. How many meters is the water storage depth of the pool?
测量水池蓄水的深度，把6米长的竹竿插入水中，露出水面1.42米，入泥部分0.3米，水池蓄水的深度是多少米？
<gadget id="calculator">6 - 1.42 - 0.3</gadget>
<output>4.28</output>

<result>4.28</result>