rectangle with a width of 15 cm is surrounded by a wire 80 cm long, what is the length of the rectangle in cm?
用一根80厘米长的铁丝围成一个宽是15厘米的长方形，这个长方形的长是多少厘米？
<gadget id="calculator">80 / 2</gadget>
<output>40</output>

<gadget id="calculator">40 - 15</gadget>
<output>25</output>

<result>25</result>