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A conversion from String to Float can be a surprise sometimes....
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| 1.9.3-p286 :007 > '85.78'.to_f | |
| => 85.78 | |
| 1.9.3-p286 :008 > '85.78'.to_f * 100 | |
| => 8578.0 | |
| 1.9.3-p286 :012 > '81.06'.to_f * 100 | |
| => 8106.0 | |
| 1.9.3-p286 :013 > '81.03'.to_f * 100 | |
| => 8103.0 | |
| 1.9.3-p286 :009 > '81.07'.to_f * 100 | |
| => 8106.999999999999 | |
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