A cuboid container whose length, width, and height are 10 cm, 10 cm, and 6 cm respectively contains water with a depth of 4 cm. If a cube iron block with a side length of 5 cm is placed in the container, what is the depth of the water in cm?
在长、宽、高分别是10cm、10cm、6cm的长方体的容器中盛有深4cm的水，在向容器中放入棱长5cm的正方体铁块，则水深变为多少cm．
<gadget id="calculator">10 * 10 * 4</gadget>
<output>400</output>

<gadget id="calculator">5 * 5 * 5</gadget>
<output>125</output>

<gadget id="calculator">400 + 125</gadget>
<output>525</output>

<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<gadget id="calculator">525 / 100</gadget>
<output>21/4 = around 5.25</output>

<result>21/4 = around 5.25</result>