How can we handle regx or patterns?

[Kadasiddha]

Is your feature request related to a problem? Please describe.
Can we handle regx or pattern in excel4node?
For example decimal. (10000000.00000000)
It should take 9999999999.99999999 so total 18 digits with 8 decimal places. the issue is excel converts after 15

Describe the solution you'd like
I am using string for this and need to add pattern or formula (like DECIMAL(10,8)) for the same.

Also if you have any other solution, please suggest.

Thanks in advance

Sid