Submerge an iron block with a volume of 80 cubic centimeters in a cuboid container with a square bottom and a perimeter of 20 cm. The height of the water surface is 10 cm. If the iron block is taken out, how high is the water surface?
把一个体积为80立方厘米的铁块浸没在底面是正方形且周长为20厘米的长方体容器中，水面高度为10厘米，如果把铁块捞出后，水面高多少？
<gadget id="calculator">20 / 4</gadget>
<output>5</output>

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

<gadget id="calculator">80 / 25</gadget>
<output>16/5 = around 3.2</output>

<gadget id="calculator">10 - (16/5)</gadget>
<output>34/5 = around 6.8</output>

<result>34/5 = around 6.8</result>