102 inches is legal, but that must include your side mirrors too. Wide body motorhomes have the body being 102 inches and the mirrors can stick out at least another foot on each side. How far you can stray from the interstate varies by state.
Sometimes, you need to know exactly how many years, months and days between two dates, in this situation, the following long formula may help you. 1. Years,  & DATEDIF(B1,B2,YM) &  Months,  & DATEDIF(B1,B2,MD) &  Days. Note: In the above formula, B1 indicates the start date and B2 stands for the end date, you can modify them as you need.
Last menstrual period. The most common method of calculating your due date is by taking the first day of your last menstrual period (LMP), adding 7 days, and then counting backward 3 months. For example, if your LMP started on March 20, you would add 7 days to get March 27, and then subtract 3 months to get a due date of December 27.