A cuboid glass tank is 80cm long, 50cm wide, and 60cm high, and the water depth inside is 30cm. A cube stone with a side length of 20cm is completely immersed in the water. How deep is the water in the glass tank at this time?
一个长方体的玻璃缸，长是80cm，宽50cm，高60cm，里面水深30cm，将一块棱长20cm的正方体石块完全浸入水中，这时玻璃缸内水深多少cm？
<gadget id="calculator">20 * 20 * 20</gadget>
<output>8_000</output>

<gadget id="calculator">80 * 50</gadget>
<output>4_000</output>

<gadget id="calculator">8_000 / 4_000</gadget>
<output>2</output>

<gadget id="calculator">30 + 2</gadget>
<output>32</output>

<result>32</result>