The diameter of a circle is 10 centimeters, if its radius is increased by 1 centimeter, what is its area in square centimetres?
一个圆的直径是10厘米，如果它的半径增加1厘米，它的面积是多少平方厘米．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36</gadget>
<output>113.04</output>

<result>113.04</result>