表达式1: left parenthesis, StartFraction, 0.0 0 2 7 0 8 3 ( 1 plus 0.0 0 2 7 0 8 3 ) to the 360th power Over ( 1 plus 0.0 0 2 7 0 8 3 ) to the 360th power minus 1 , EndFraction , right parenthesis times 3250000.0027083(1+0.0027083)360(1+0.0027083)360−1·325000