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C:\>perl -MMath::Decimal64 -le "$x=Math::Decimal64->new(0); $x += Math +::Decimal64->new('20.1') for (1..43);print $x;" 8643e-1
perl -MMath::Decimal64 -le "$x=Math::Decimal64->new(0); $x += '20.1' f +or (1..43);print $x;"