use strict; use bignum; my $e = 0.00141; my $o =1; for(my $r=0; $r<=10; $r++){ $o *=$e; print "$o\n"; } #### 0.00141 0.0000019881 0.000000002803221 0.00000000000395254161 0.0000000000000055730836701 0.000000000000000007858047974841 0.00000000000000000001107984764452581 0.0000000000000000000000156225851787813921 0.000000000000000000000000022027845102081762861 0.00000000000000000000000000003105926159393528563401 0.0000000000000000000000000000000437935588474487527439541 #### 0.00000000000000000000000000003105926159393528563401 #### 0.000000000000000000000000000031059