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  1. or download this
    >perl -le "print 1.4/10;"
0.14
  2. or download this
    >perl -le "print 'wtf' if 0.14 != 1.4/10;"
wtf
  3. or download this
    >perl -le "print 'ok' if 0.13999999999999999 == 1.4/10;"
ok
  4. or download this
    >perl -le "printf '%.17g', 1e+23" 
9.9999999999999992e+22