$ round_to_5.pl VAL: -2.400000 EXP: 0.000000 RES: 0.000000 VAL: -8.300000 EXP: -10.000000 RES: -10.000000 VAL: 7.100000 EXP: 5.000000 RES: 5.000000 VAL: -2.600000 EXP: -5.000000 RES: -5.000000 VAL: 8.400000 EXP: 10.000000 RES: 10.000000