An isosceles triangle has a perimeter of 42 cm and one of the sides is 16 cm long. What is the length of the base?
一个等腰三角形，周长是42厘米，其中一条腰长16厘米，底边长多少厘米？
<gadget id="calculator">16 * 2</gadget>
<output>32</output>

<gadget id="calculator">42 - 32</gadget>
<output>10</output>

<result>10</result>