Fill a cube glass tank with a side length of 90cm with water, and then pour the water into a cuboid glass tank with a length of 120cm and a width of 81cm. How deep is the water at this time?
在棱长为90cm的正方体玻璃缸里装满水，然后将这些水倒入长120cm，宽81cm的长方体玻璃缸里，这时水深多少？
<gadget id="calculator">90 * 90 * 90</gadget>
<output>729_000</output>

<gadget id="calculator">120 * 81</gadget>
<output>9_720</output>

<gadget id="calculator">729_000 / 9_720</gadget>
<output>75</output>

<result>75</result>