The perimeter of an isosceles triangle is 40 cm and the base is 12 cm. What is the length of each side in cm?
一个等腰三角形的周长是40厘米，底边长是12厘米，每条腰长是多少厘米？
<gadget id="calculator">40 - 12</gadget>
<output>28</output>

<gadget id="calculator">28 / 2</gadget>
<output>14</output>

<result>14</result>