An isosceles triangle has a base length of 4.6 cm and a waist length of 5.2 cm. What is its perimeter in cm?
一个等腰三角形，底边长4.6厘米，腰长5.2厘米，它的周长是多少厘米？
<gadget id="calculator">5.2 * 2</gadget>
<output>10.4</output>

<gadget id="calculator">10.4 + 4.6</gadget>
<output>15</output>

<result>15</result>