For wooden windows installed on rural houses in my country, the side length of the square wooden frame is 1 meter. What is the area between the outer square and the inner circle?
我国农村房屋上安装的木窗，正方形的木框边长是1米，外面的正方形与内部圆之间的面积是多少？
<gadget id="calculator">1 * 1</gadget>
<output>1</output>

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

<gadget id="calculator">(1/2) ** 2</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3.14 * (1/4)</gadget>
<output>0.785</output>

<gadget id="calculator">1 - 0.785</gadget>
<output>0.215</output>

<result>0.215</result>