The ratio of the volume of water and ice of the same mass is 9:10, and the volume of a piece of ice is 90 cubic decimeters, what is the volume after it turns into water?
相同质量的水和冰的体积之比为9：10，一块体积是90立方分米的冰，化成水后体积是多少？
<gadget id="calculator">9 * 90</gadget>
<output>810</output>

<gadget id="calculator">810 / 10</gadget>
<output>81</output>

<result>81</result>