Calculation Mistake 1.5 * 0.3

[zeneregion]

BPO	25762
Nosy	@ethanfurman
Files	Screenshot from 2015-11-29 17-39-20.png: error_screenshot

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2015-11-29.16:50:59.411>
created_at = <Date 2015-11-29.16:40:53.233>
labels = ['type-bug', 'invalid']
title = 'Calculation Mistake 1.5  * 0.3'
updated_at = <Date 2015-11-29.16:50:59.409>
user = 'https://bugs.python.org/zeneregion'

bugs.python.org fields:

activity = <Date 2015-11-29.16:50:59.409>
actor = 'ethan.furman'
assignee = 'none'
closed = True
closed_date = <Date 2015-11-29.16:50:59.411>
closer = 'ethan.furman'
components = []
creation = <Date 2015-11-29.16:40:53.233>
creator = 'zeneregion'
dependencies = []
files = ['41190']
hgrepos = []
issue_num = 25762
keywords = []
message_count = 2.0
messages = ['255579', '255580']
nosy_count = 2.0
nosy_names = ['ethan.furman', 'zeneregion']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue25762'
versions = ['Python 3.4']

[zeneregion]

Dear Authorized Person,

When I was using python, I found a bug. When I multiplied 1.5 time 0.3, I got 0.44999999999999996 as a result.

Best Regards,
Yunus

[ethanfurman]

Floating point calculations are not exact.

https://docs.python.org/3/tutorial/floatingpoint.html
https://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html