The length of a rectangle is 5 cm and the width is 4 decimeters. If the largest square is removed from the rectangle, what is the perimeter of the remaining figure?
一个长方形的长是5公分、宽是4分米，从长方形里去掉一个最大的正方形，剩下的图形的周长是多少分米
<gadget id="calculator">5 - 4</gadget>
<output>1</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

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

<result>12</result>