What is the area in square centimeters of a sector with a central angle of 120° and a radius of 12 centimeters?
圆心角为120°，半径为12厘米的扇形的面积是多少平方厘米．
<gadget id="calculator">120 / 360</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12 ** 2</gadget>
<output>144</output>

<gadget id="calculator">(1/3) * 3.14 * 144</gadget>
<output>150.72</output>

<result>150.72</result>