The radius of the large circle is equal to the diameter of the small circle. It is known that the area of the large circle is 45 square centimeters larger than that of the small circle. What is the area of the large circle in square centimeters?
大圆的半径相当于小圆的直径，已知大圆的面积比小圆的面积多45平方厘米，大圆的面积是多少平方厘米．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">45 / 3</gadget>
<output>15</output>

<gadget id="calculator">15 * 4</gadget>
<output>60</output>

<result>60</result>