A piece of iron wire surrounds a square with a side length of 16 meters. Now you want to surround the city with this iron wire with an isosceles triangle whose waist base is 12 meters. How many meters is its waist at this time?
一根铁丝围城一个边长为16米的正方形，现在想要把这根铁丝围城一个腰底边为12米的等腰三角形，这时它的腰是多少米？
<gadget id="calculator">16 * 4</gadget>
<output>64</output>

<gadget id="calculator">64 - 12</gadget>
<output>52</output>

<gadget id="calculator">52 / 2</gadget>
<output>26</output>

<result>26</result>