If one side of a parallelogram is 25 cm long and 3 cm shorter than its adjacent side, find the perimeter of the parallelogram.
平行四边形的一条边长是25厘米，比与它相邻的边短3厘米，求这个平行四边形的周长．
<gadget id="calculator">25 + 3</gadget>
<output>28</output>

<gadget id="calculator">25 + 28</gadget>
<output>53</output>

<gadget id="calculator">53 * 2</gadget>
<output>106</output>

<result>106</result>