1________1 5+14+_13+_2

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1______________15+________14+_____13+___21______________15+________14+_____13+___21______________15+

1______________1 5+________14+_____13+___2
1
______________
1
5+________
1
4+_____
1
3+___
2

1______________1 5+________14+_____13+___2
=1/(5+1/(4+1/(3+1/2)))
=1/(5+1/(4+1/(7/2)))
=1/(5+1/(4+2/7))
=1/(5+1/(30/7))
=1/(5+7/30)
=1/(157/30)
=30/157

=1/(5+1/(4+1/(3+1/2)))
=1/(5+1/(4+1/(7/2)))
=1/(5+1/(4+2/7))
=1/(5+1/(30/7))
=1/(5+7/30)
=1/(157/30)
=30/157