Changed trillion to billion and edge case is taken care

[mihirkestur]

For the edge case (n >= T), numbers will be represented in terms of "gB" units. i.e. All numbers greater than or equal to 10^9 will be represented in terms of gigabytes (billion bytes). This resolves the edge case, if numbers were greater than 10^12, empty values would be returned.

Fixes #118

Type of change

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• [X] Bug fix (non-breaking change which fixes an issue)

Checklist:

• [X] I have read the contribution guidelines and followed it as far as possible.
• [ ] I have performed a self-review of my own code (if applicable)
• [ ] I have commented my code, particularly in hard-to-understand areas (if applicable)
• [ ] I have run go fmt on my code (reference)
• [ ] I have made corresponding changes to the documentation (if applicable)
• [X] My changes generate no new warnings
• [ ] Any dependent and pending changes have been merged and published