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USING: io kernel math math.parser ;
 
   readln string>number
   dup
   dup
   3
   *
   *
   number>string print

Runtime error #stdin #stdout 0.19s 163968KB

stdin

stdout

300
Quotation's stack effect does not match call site
quot      [ readln string>number dup dup 3 * * number>string print ]
call-site (( -- ))

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