What is the perimeter of 5 squares with a side length of 2 cm to form a rectangle?
把5个边长2厘米的正方形拼成一个长方形，这个长方形的周长是多少．
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">10 + 2</gadget>
<output>12</output>

<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<result>24</result>