In a cube tank filled with water with a side length of 20 cm (measured from the inside), there is a cuboid iron block with a length of 16 cm and a width of 10 cm. When the iron block is taken out, the water in the tank drops by 2 cm. What is the height of this iron block?
在一个装满水的棱长为20cm(从里面量)的正方体水缸里，有一块长16cm，宽10cm的长方体铁块，当把铁块取出后，水缸里的水下降了2cm．这块铁块的高是多少？
<gadget id="calculator">16 * 10</gadget>
<output>160</output>

<gadget id="calculator">2 / 160</gadget>
<output>1/80 = around 0.0125</output>

<gadget id="calculator">20 * 20 * (1/80)</gadget>
<output>5</output>

<result>5</result>