How many nanoseconds are in a year?
1 year = 3.1556926 × 10^16 nanoseconds
hope this helps!!
(1 year) x (86,400 sec/day) x (365-1/4 day/yr) x (10⁹ nanos./sec) = (1 x 86,400 x 365-1/4 x 10⁹) nanosec = 31,557,600 x 10⁹ nanosec = 3.15576 x 10¹⁶ nanosec(This is a rough answer, because the 'year' is not exactly 365-1/4 days.)
