A circle with a diameter of 12 cm, what is the area in square centimeters (take π=3.14)
一个圆，直径12厘米，面积是多少平方厘米(取π=3.14)
<gadget id="calculator">12 / 2</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>