The circumference of the large circle is 4 times the circumference of the small circle. The area of the small circle is 4 square centimeters. What is the area of the large circle in square centimeters?
大圆周长是小圆周长的4倍，小圆的面积是4平方厘米，大圆的面积是多少平方厘米．
<gadget id="calculator">16 / 1</gadget>
<output>16</output>

<gadget id="calculator">4 * 16</gadget>
<output>64</output>

<result>64</result>