If the base of a triangle remains unchanged, the height increases by 8 cm and the area increases by 40 cm2. If the height remains the same, the base increases by 6 cm and the area increases by 54 cm2. Find the area of the original triangle.
一个三角形底不变，高增加8厘米，面积增加40平方厘米，如果高不变，底增加6厘米，面积增加54平方厘米，求原三角形的面积．
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">10 * 9</gadget>
<output>90</output>

<result>90</result>