A wire can exactly form a rectangle whose length is 8dm and width is 4dm. If a square is surrounded by this wire, what is the area of the square?
一根铁丝正好能围成一个长是8dm，宽是4dm的长方形．如果用这根铁丝围成正方形，这个正方形的面积是多少？
<gadget id="calculator">8 + 4</gadget>
<output>12</output>

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

<gadget id="calculator">12 * (1/2)</gadget>
<output>6</output>

<gadget id="calculator">6 * 6</gadget>
<output>36</output>

<result>36</result>