If a wire with a length of 9.42 meters is used to form the largest circle, what is the area of the circle in square meters?
把一根长是9.42米的铁丝围成一个最大的圆，圆的面积是多少平方米．
<gadget id="calculator">9.42 / 3.14 / 2</gadget>
<output>1.5</output>

<gadget id="calculator">1.5 ** 2</gadget>
<output>2.25</output>

<gadget id="calculator">3.14 * 2.25</gadget>
<output>7.065</output>

<result>7.065</result>