An isosceles triangle has a perimeter of 36 cm and a waist of 10 cm. What is the length of its base?
一个等腰三角形周长是36厘米，腰长10厘米，它的底边长多少厘米？
<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">36 - 20</gadget>
<output>16</output>

<result>16</result>