A cuboid wooden box is 5m long, 4m wide, and 3m high. What is the area of its smallest surface in m**2.
一个长方体木箱，长5m，宽4m，高3m，它最小的一个面的面积是多少m**2．
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>