Converting from miles to kilometers- https://docs.google.com/file/d/0B4-8yYQ-cWAGUWZLNEcyMWZKbDQ/edit
Metric conversions simple extensions- https://docs.google.com/file/d/0B4-8yYQ-cWAGYm9CR3FOeXEyWUU/edit
Time zones- https://docs.google.com/file/d/0B4-8yYQ-cWAGaW94ZVItaE54UFE/edit
Metric conversions simple extensions- https://docs.google.com/file/d/0B4-8yYQ-cWAGYm9CR3FOeXEyWUU/edit
Time zones- https://docs.google.com/file/d/0B4-8yYQ-cWAGaW94ZVItaE54UFE/edit
