To make a plastic bag with a length of 3 decimeters and a width of 2 decimeters, at least how many square decimeters of plastic film is needed.
做一只长3分米、宽2分米的塑料袋，至少需要多少平方分米塑料薄膜．
<gadget id="calculator">3 * 2 * 2</gadget>
<output>12</output>

<result>12</result>