When 3 squares with side lengths of 4 decimeters are put together to form a rectangle, how many decimeters is reduced in the perimeter
把3个边长为4分米的正方形拼成一个长方形后，周长减少了多少分米
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<result>16</result>