A circle with a radius of 4 decimeters is folded in half consecutively 3 times and placed on the table. What is the area in square meters that covers the tabletop?
一个半径是4分米的圆，连续对折3次，放在桌上．盖住桌面部分的面积是多少平方分米．
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">3.14 * 16 * (1/8)</gadget>
<output>6.28</output>

<result>6.28</result>