The height of one side of a triangle is 2 cm. If the height increases by 6 cm and the base remains the same, the area increases by 12 cm2. What is the area of the original triangle?
一个三角形的一条高是2厘米．如果高增加6厘米，底不变，则面积增加12平方厘米，原三角形的面积是多少平方厘米．
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">4 * 1</gadget>
<output>4</output>

<result>4</result>