cuboid reservoir is 5m long, 3m wide, and 1.5m high. What is the area occupied by this reservoir in m**2.
一个长方体蓄水池长5m，宽3m，高1.5m，这个蓄水池的占地面积是多少m**2．
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<result>15</result>