To cut a circular piece of paper with an area of 9.42 square decimeters, at least a square piece of paper with an area of how many square decimeters is required.
要剪一个面积是9.42平方分米的圆形纸片，至少要面积是多少平方分米的正方形纸片．
<gadget id="calculator">9.42 / 3.14</gadget>
<output>3</output>

<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>