# Grok pattern to format a special date and scientific notation number
**URL:** https://discuss.elastic.co/t/grok-pattern-to-format-a-special-date-and-scientific-notation-number/160786
**Category:** Logstash
**Created:** [December 13, 2018, 5:00pm UTC](https://discuss.elastic.co/t/grok-pattern-to-format-a-special-date-and-scientific-notation-number/160786 "2018-12-13T17:00:40Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@pad](https://discuss.elastic.co/u/pad)
#### Post date: [December 13, 2018, 5:00pm UTC](https://discuss.elastic.co/t/grok-pattern-to-format-a-special-date-and-scientific-notation-number/160786/1 "2018-12-13T17:00:40Z")
Hi,
I'm looking for two special patterns to convert a date with a special format and to convert a number with scientific notation.
For the date, I've got this format yyyyMMdd\_hh:mm:ss (ex: 20181204\_10:50:07)
For the scientific notation, here's what I've got and what I want :
- 2.474731e+01 =\> 24.74731
- 2.211762e+00 =\> 2.211762
- 9.629999e-01 =\> 0.9629999
Thanks for your help
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### Author:  [@AquaX](https://discuss.elastic.co/u/AquaX)
#### Post date: [December 16, 2018, 1:22am UTC](https://discuss.elastic.co/t/grok-pattern-to-format-a-special-date-and-scientific-notation-number/160786/2 "2018-12-16T01:22:02Z")
You may need to split the input into multiple fields and then use a ruby filter to manually multiple field A by field B.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [January 13, 2019, 1:22am UTC](https://discuss.elastic.co/t/grok-pattern-to-format-a-special-date-and-scientific-notation-number/160786/3 "2019-01-13T01:22:21Z")
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