A parallelogram is 7 meters high and its base is 2.5 meters less than 1.5 times its height. What is its area?
一个平行四边形，高7米，底比高的1.5倍少2.5米，它的面积是多少？
<gadget id="calculator">7 * 1.5</gadget>
<output>10.5</output>

<gadget id="calculator">10.5 - 2.5</gadget>
<output>8</output>

<gadget id="calculator">8 * 7</gadget>
<output>56</output>

<result>56</result>