What is the perimeter of a rectangle made of two squares whose sides are 8 cm long?
用两个边长是8厘米的正方形拼成一个长方形，它的周长是多少厘米
<gadget id="calculator">8 + 8 + 8</gadget>
<output>24</output>

<gadget id="calculator">24 * 2</gadget>
<output>48</output>

<result>48</result>