The two waists of a right-angled trapezoid are 4 cm and 6 cm respectively, and the perimeter is 26 cm. What is the area of the trapezoid in square centimeters?
直角梯形的两腰长分别为4厘米和6厘米，周长是26厘米，则梯形的面积是多少平方厘米．
<gadget id="calculator">26 - 4 - 6</gadget>
<output>16</output>

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

<gadget id="calculator">16 * 2</gadget>
<output>32</output>

<result>32</result>