A wire can form a rectangle with a length of 16 cm and a width of 14 cm (the joints are ignored). If a square is surrounded by this wire, what is its area?
一根铁丝能围成一个长16厘米、宽14厘米的长方形(接头处忽略不计)．如果用这根铁丝围成一个正方形，它的面积是多少？
<gadget id="calculator">16 + 14</gadget>
<output>30</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">30 * (1/2)</gadget>
<output>15</output>

<gadget id="calculator">15 * 15</gadget>
<output>225</output>

<result>225</result>