If the radius of the large circle is 2 cm and the radius of the small circle is 1 cm, how many times the area of the large circle is the area of the small circle?
大圆的半径2厘米，小圆半径1厘米，大圆面积是小圆面积的多少倍．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1</gadget>
<output>3.14</output>

<gadget id="calculator">12.56 / 3.14</gadget>
<output>4</output>

<result>4</result>