On a piece of square paper, after cutting the largest circle, the remaining area is 43 square centimeters, so what is the area of the circle in square centimeters?
在一张正方形的纸上，剪一个最大的圆后，剩下的面积是43平方厘米，那么圆的面积是多少平方厘米．
<gadget id="calculator">3.14 * 50</gadget>
<output>157</output>

<result>157</result>