The base of a triangle is 6 meters, if the base is extended by 1 meter, the area will increase by 1.5 square meters. What is the area of the original triangle in square meters?
一个三角形的底是6米，如果将底延长1米，面积就增加1.5平方米．原来三角形的面积是多少平方米？
<gadget id="calculator">2 / 1</gadget>
<output>2</output>

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

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

<gadget id="calculator">6 * (3/2)</gadget>
<output>9</output>

<result>9</result>