Alright, let's work through 5281 times 1016 step by step
5281 × 1016 = 1016 × (5281)
+ 1016 × 1 what gives us 1016
+ 1016 × 80 that results in 81280
+ 1016 × 200 yielding 203200
+ 1016 × 5000 producing 5080000

= 5365496
