A 122 cm long iron wire is formed into a rectangle, and the joints overlap by 2 cm. If the width of the rectangle is 10 cm, what is the length of the rectangle in cm?
把一根长122厘米的铁丝，围成一个长方形，接头处重合2厘米，要使长方形的宽是10厘米，长方形的长是多少厘米？
<gadget id="calculator">122 - 2</gadget>
<output>120</output>

<gadget id="calculator">120 / 2</gadget>
<output>60</output>

<gadget id="calculator">60 - 10</gadget>
<output>50</output>

<result>50</result>