A wire is 1.2 meters long and folded into an equilateral triangle. The height of one side is 3.4 decimeters. What is the area of this triangle?
一根铁丝长1.2米，折成一个等边三角形，它的一边上的高是3.4分米，这个三角形的面积是多少平方分米．
<gadget id="calculator">1.2 * 10</gadget>
<output>12</output>

<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">3.4 / 2</gadget>
<output>1.7</output>

<gadget id="calculator">4 * 1.7</gadget>
<output>6.8</output>

<result>6.8</result>