A rope 8 meters long goes around a square table exactly, what is the area of the square table in square meters?
一根长8米的绳子正好绕方桌一周，这个方桌的面积是多少平方米．
<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<result>4</result>