There is 150ml of water in a measuring cup. After putting an irregular stone, the water level reaches the 240ml scale. What is the volume of the stone in cm**3.
一个量杯中原有150毫升水，放入一个不规则的石块后，水平面达到240毫升刻度，这个石块的体积是多少cm**3．
<gadget id="calculator">240 - 150</gadget>
<output>90</output>

<result>90</result>