This game is kind of fun:
(10x #. '0' -&(a.&i.) }.) {. 8!:2 ] _9223372036854775808
9223372036854775808
fNr =: [: {. 8!:2 NB. Format number
sb0 =: 10x #. '0' -&(a.&i.) ] NB. Subtract '0'
(,&.": sb0)&>/@split fNr _9223372036854775808 NB. Loss of
fidelity, too bad
_9223372036854775807
(".@, 'x' ,~ ":@sb0)&>/@split fNr _9223372036854775808
_9223372036854775808
-Dan
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