Xiao Ming formed an isosceles trapezoid with an iron wire. Its upper base is 26 cm long, its lower base is 40 cm long, and its waist is 15 cm long. How many centimeters is this wire long?
小明用一根铁丝围成了一个等腰梯形，它的上底长26厘米，下底长40厘米，一条腰长15厘米，这根铁丝长多少厘米．
<gadget id="calculator">15 * 2</gadget>
<output>30</output>

<gadget id="calculator">26 + 40 + 30</gadget>
<output>96</output>

<result>96</result>