A cube water tank with a length of 4 decimeters is filled with water and poured into another cuboid water tank with a length of 0.8 meters and a width of 25 cm. What is the depth of the water? (Solution of column equation)
一种正方体水箱，长4分米，装满水后，倒入另一个长0.8米、宽25厘米的长方体水箱中，水深多少？(列方程解)
<gadget id="calculator">4 * 4 * 4</gadget>
<output>64</output>

<gadget id="calculator">8 * 2.5</gadget>
<output>20</output>

<gadget id="calculator">64 / 20</gadget>
<output>16/5 = around 3.2</output>

<result>16/5 = around 3.2</result>