The perimeter of a right-angled trapezoid is 36 cm, the sum of the upper and lower bases is 2.6 times the sum of the two waists, and the length of one waist is 4 cm. What is the area of this right-angled trapezoid in square centimeters?
一个直角梯形周长是36厘米，上、下底之和是两腰之和的2.6倍，一条腰长4厘米，这个直角梯形的面积是多少平方厘米．
<gadget id="calculator">26 / 36</gadget>
<output>13/18 = around 0.722222</output>

<gadget id="calculator">36 * (13/18)</gadget>
<output>26</output>

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

<gadget id="calculator">26 * 2</gadget>
<output>52</output>

<result>52</result>