A cube tank with a side length of 8 decimeters is filled with 490 liters of water. Pour the water into a cuboid tank with a length of 10 decimeters, a width of 7 decimeters, and a height of 8 decimeters. What is the depth of the water in the tank?
一个棱长8分米的正方体水槽里装了490升水，把这些水倒入一个长10分米，宽7分米，高8分米的长方体水槽里，水槽里的水深是多少？
<gadget id="calculator">10 * 7</gadget>
<output>70</output>

<gadget id="calculator">490 / 70</gadget>
<output>7</output>

<result>7</result>