Take the three vertices of an equilateral triangle as the center and half the side length as the radius to draw an arc inside the equilateral triangle. The side length of the equilateral triangle is 4 cm. What is the total area of the three sectors in square centimeters?
以等边三角形的三个顶点为圆心，边长一半为半径在等边三角形内作弧，等边三角形的边长为4厘米，则三个扇形的面积共是多少平方厘米．
<gadget id="calculator">180 / 360</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">(1/2) * 3.14 * 4</gadget>
<output>6.28</output>

<result>6.28</result>