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If you are using integers, and want to use Math::BigInt:
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<b>Math::BigInt - Arbitrary size integer math package</b><br>
<br><b>
DESCRIPTION </b><br><br>
All operators (inlcuding basic math operations) are overloaded if you declare your big integers as <br>
<br>
<code> $i = new Math::BigInt '123_456_789_123_456_789'; </code>
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<br><b>METHODS</b><br>
<br><b>round </b><br>
<code>
$x->round($A,$P,$round_mode); # round to accuracy or precision using mode $r
</code><br>
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