The lower base of a trapezoid is 5 cm, which is 2.5 times the upper base, and the height is twice the upper base. What is the area of the trapezoid in square centimeters?
一个梯形的下底是5厘米，是上底的2.5倍，高是上底的2倍，这个梯形的面积是多少平方厘米
<gadget id="calculator">5 / 2.5</gadget>
<output>2</output>

<gadget id="calculator">2 + 5</gadget>
<output>7</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">7 * 2 * 1</gadget>
<output>14</output>

<result>14</result>