Use a piece of wire to form the largest rectangle with a length of 5 cm and a width of 3 cm. If a large square is surrounded by this wire, what is the perimeter of the square in centimeters?
用一根铁丝围成一个最大的长方形，长5厘米、宽3厘米．如果用这根铁丝围成一个大正方形，正方形的周长是多少厘米．
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>