Can you measure the volume of a potato? The following operation will give you inspiration: Put 10cm deep water in a cuboid tank with a length of 20cm and a width of 15cm, submerge the potatoes in the water, and measure the current water depth to be 12cm. Please calculate the volume of this potato.
你会测量一块土豆的体积吗？进行下边的操作会给你启示：在一个长20cm，宽15cm的长方体水槽中放入10cm深的水，把土豆浸没水中，测量现在水深为12cm．请你算出这块土豆的体积．
<gadget id="calculator">12 - 10</gadget>
<output>2</output>

<gadget id="calculator">20 * 15 * 2</gadget>
<output>600</output>

<result>600</result>