If the base of an isosceles triangle is 12 cm long and the waist is 2 cm longer than it, what is its perimeter in cm?
一个等腰三角形底边长是12厘米，腰比它长2厘米，它的周长是多少厘米．
<gadget id="calculator">12 + 2</gadget>
<output>14</output>

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

<gadget id="calculator">12 + 28</gadget>
<output>40</output>

<result>40</result>