Alright, let's work through 5256 times 3902 step by step
5256 × 3902 = 3902 × (5256)
+ 3902 × 6 yielding 23412
+ 3902 × 50 resulting in 195100
+ 3902 × 200 that results in 780400
+ 3902 × 5000 yielding 19510000

= 20508912
