The base of an isosceles triangle is 4 cm and the waist is 6 cm. What is its perimeter in cm?
一个等腰三角形的底是4厘米，腰是6厘米，它的周长是多少厘米．
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">12 + 4</gadget>
<output>16</output>

<result>16</result>