Use wire to form a rectangle 8 cm long and 3 cm wide. How long is the wire at least?
用铁丝围成一个长8厘米，宽3厘米的长方形．至少要用多长的铁丝？
<gadget id="calculator">8 + 3</gadget>
<output>11</output>

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

<result>22</result>