The base of a triangle is 3 meters long. If the base is extended by 2 meters, the area increases by 8 square meters. What is the area of the original triangle in square meters?
一个三角形底长3米，如果底延长2米，那么面积增加8平方米，原来的三角形面积是多少平方米？
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">8 * 1 * (3/2)</gadget>
<output>12</output>

<result>12</result>