1.9 e$B$G$O!"e(BBignum#div e$B$,e(B Bignum#/
e$B$H$^$C$?$/F1$8$K$J$C$F$$$k$h$&$G!“e(B
e$B@5$7$$7k2L$,F@$i$l$J$$$3$H$,$”$j$^$9!#e(B
$ ruby18 -r rational -e ‘p 1073741824.div(Rational(3,2))’
715827882
$ ruby19 -r rational -e ‘p 1073741824.div(Rational(3,2))’
Rational(2147483648, 3)