The height of a parallelogram and a trapezoid are both 8 cm. The lower base of the trapezoid coincides with the base of the parallelogram, both are 25 cm. The upper base of the trapezoid is 3 cm less than the lower base. How much less is the area of the trapezoid than the area of the parallelogram square centimeter?
一个平行四边形和一个梯形的高都是8厘米，梯形的下底与平行四边形的底重合，都是25厘米，梯形的上底比下底少3厘米，梯形的面积比平行四边形的面积少多少平方厘米？
<gadget id="calculator">25 * 8</gadget>
<output>200</output>

<gadget id="calculator">25 - 3</gadget>
<output>22</output>

<gadget id="calculator">25 + 22</gadget>
<output>47</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">47 * 4</gadget>
<output>188</output>

<gadget id="calculator">200 - 188</gadget>
<output>12</output>

<result>12</result>