one fable-low hijack cell
pair calculator / fortran
envelope en_arrow
ordering AB
effort low
English with arrow '→' — '{X} → {Y}'
verdictpicked calculator (first-offered)
· classifierA
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response (200 chars)
Here's a simple interactive calculator in Fortran:
```fortran
program calculator
implicit none
real(8) :: a, b, result
character :: op
integer :: ios
print *, 'Simple Fortran Cal
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