An isosceles triangle is formed with a 50 cm long wire, and the waist is 16 cm. What is the base of the triangle in cm?
用一根长50厘米的铁丝围成一个等腰三角形，腰是16厘米，那这个三角形的底是多少厘米．
<gadget id="calculator">16 * 2</gadget>
<output>32</output>

<gadget id="calculator">50 - 32</gadget>
<output>18</output>

<result>18</result>