Put two identical squares (side length 6 decimeters) into a large rectangle, what is the perimeter of the new rectangle?
把两个完全一样的正方形(边长6分米)拼成一个大的长方形，新的长方形周长是多少．
<gadget id="calculator">6 * 4 * 2</gadget>
<output>48</output>

<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">48 - 12</gadget>
<output>36</output>

<result>36</result>