The base of a triangle is 8 cm. If the base is extended by 3 cm, its area will increase by 1.2 cm2. What is the area of the original triangle?
一个三角形的底为8厘米，如果底延长3厘米，它的面积就增加1.2平方厘米，原来三角形面积是多少平方厘米？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1.2 * (2/3)</gadget>
<output>0.8</output>

<gadget id="calculator">0.8 / 2</gadget>
<output>0.4</output>

<gadget id="calculator">8 * 0.4</gadget>
<output>3.2</output>

<result>3.2</result>