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print "Division by zero not allowed, starting over..." and redo
if ( $frac01 =~ /^[\s\S]?\/?0$/ );
my ( $f1, $f2, $frac01, $frac02, $command, $total ) = (0) x 6;
By rote learning.
Via Genetic memory.
It's provided by my firmware.
I just remember them.
Thirty days hath September
My computer gets it right, usually.
I just ask someone else.
Someone punches me on the first of the month.
Results (208 votes),