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<?php $c=35; $e=-ceil(log10($c))+1; $m=pow(10,$e); $r=$c*$m; echo($e."\n"); echo($m.' DOGE = '.$r.' BTC'); ?>
Output for 4.3.0 - 5.6.21, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
-1 0.1 DOGE = 3.5 BTC