The area of a trapezoid is 1.5 square decimeters, its upper base is 0.8 decimeters, its lower base is 1.7 decimeters, and its height is decimeters.
一个梯形的面积是1.5平方分米，它的上底是0.8分米，下底是1.7分米，高是多少分米．
<gadget id="calculator">0.8 + 1.7</gadget>
<output>2.5</output>

<gadget id="calculator">2 / 2.5</gadget>
<output>0.8</output>

<gadget id="calculator">1.5 * 0.8</gadget>
<output>1.2</output>

<result>1.2</result>