A cylindrical container containing water has a base radius of 5 cm, a height of 20 cm, and a depth of 15 cm. An iron cylinder with a bottom radius of 2 cm and a height of 10 cm is completely submerged in the container. What is the current depth of water in cm?
一个盛水的圆柱形容器，底面半径是5厘米，高20厘米，水深15厘米．现将一个底面半径为2厘米，高10厘米的铁圆柱完全浸没在容器中，现在的水深是多少厘米？
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25</gadget>
<output>78.5</output>

<gadget id="calculator">10 / 78.5</gadget>
<output>0.127389</output>

<gadget id="calculator">3.14 * 4 * 0.127389</gadget>
<output>1.600006</output>

<gadget id="calculator">1.600006 + 15</gadget>
<output>16.600006</output>

<result>16.600006</result>