Cut out the largest triangle from a trapezoidal paper whose upper base is 15 cm, lower base is 22 cm, and height is 14 cm. What is the area of the remaining part?
从一个上底是15厘米，下底是22厘米，高是14厘米的梯形纸张上剪下一个最大的三角形，剩下部分的面积是多少？
<gadget id="calculator">14 / 2</gadget>
<output>7</output>

<gadget id="calculator">15 * 7</gadget>
<output>105</output>

<result>105</result>