A water cup with a bottom area of 36 square centimeters, the initial water height is 3 cm, and the water height is 5 cm after adding potatoes. What is the volume of the added potatoes in cubic centimeters?
一个底面积是36平方厘米的水杯，开始水高3厘米，加入土豆后水高5厘米，求加入土豆的体积是多少立方厘米？
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">36 * 2</gadget>
<output>72</output>

<result>72</result>