Two cylinders with the same base area, the height of one cylinder is 4.5 decimeters, the volume is 81 cubic decimeters; the height of the other cylinder is 3 decimeters, what is the volume?
两个底面积相等的圆柱，一个圆柱的高是4.5分米，体积是81立方分米；另一个圆柱的高是3分米，体积是多少．
<gadget id="calculator">81 / 4.5</gadget>
<output>18</output>

<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<result>54</result>