cuboid model has a base area of 18 decimeters and a height of 3 decimeters. What is its volume?
一个长方体模型，它的底面积是18平方分米，高是3分米，它的体积是多少立方分米？
<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<result>54</result>