The side length of a square is 1 cm, and 10 such squares are joined together to form a rectangle. What is the perimeter of the rectangle in cm?
一个正方形的边长是1cm，10个这祥的正方形顺次拼接成一个长方形，这个长方形的周长是多少cm．
<gadget id="calculator">1 * 10</gadget>
<output>10</output>

<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<gadget id="calculator">11 * 2</gadget>
<output>22</output>

<result>22</result>