The radius of the large circle is 3 cm, and the diameter of the small circle is 4 cm. How much more area is the large circle than the small circle?
大圆半径是3厘米，小圆直径是4厘米，大圆面积比小圆多多少
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

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

<gadget id="calculator">28.26 - 12.56</gadget>
<output>15.7</output>

<gadget id="calculator">15.7 / 12.56</gadget>
<output>1.25</output>

<result>1.25</result>