If a sweet potato is submerged in a cube glass tank with a side length of 2 decimeters, the water level rises by 0.5 cm. What is the volume of the sweet potato?
把一个红薯浸没到棱长是2分米的正方体玻璃缸中，水面上升了0.5厘米，这个红薯的体积是多少？
<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">20 * 20 * 0.5</gadget>
<output>200</output>

<result>200</result>