The upper base of a trapezoid is 4.8 cm, the lower base is 7.2 cm, and the height is 4.5 cm. If the largest triangle is cut off from this trapezoid, what is the remaining area in square centimeters?
一个梯形上底是4.8厘米，下底是7.2厘米，高是4.5厘米，如果在这个梯形中剪去一个最大的三角形，剩下的面积是多少平方厘米？
<gadget id="calculator">4.5 / 2</gadget>
<output>2.25</output>

<gadget id="calculator">4.8 * 2.25</gadget>
<output>10.8</output>

<result>10.8</result>