If the upper and lower bases of a trapezoid remain the same, and the height increases by 4 cm, the area increases by 64 cm2; if the lower base and height remain the same, and the upper base increases by 8 cm, the area increases by 40 cm2. What is the area of the original trapezoid in square meters? centimeter.
一个梯形如果上、下底不变，高增加4厘米，面积就增加64平方厘米；如果下底和高不变，上底增加8厘米，面积就增加40平方厘米，原来梯形的面积是多少平方厘米．
<gadget id="calculator">64 / 4</gadget>
<output>16</output>

<gadget id="calculator">2 * 16</gadget>
<output>32</output>

<gadget id="calculator">40 / 32</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">2 * (5/4)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) / 2</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">32 * (5/4)</gadget>
<output>40</output>

<result>40</result>