cuboid metal bucket without a cover, the bottom is a square with a side length of 4 decimeters and a height of 5 decimeters. How much metal is needed to make such a pair of buckets?
一种无盖的长方体铁皮水桶，底面是边长为4分米的正方形，高5分米，做这样的一对水桶至少需要多少铁皮？
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">4 * 5 * 4</gadget>
<output>80</output>

<gadget id="calculator">16 + 80</gadget>
<output>96</output>

<gadget id="calculator">96 * 2</gadget>
<output>192</output>

<result>192</result>