Alright, let's work through 5439 times 9639 step by step
5439 × 9639 = 9639 × (5439)
+ 9639 × 9 resulting in 86751
+ 9639 × 30 yielding 289170
+ 9639 × 400 giving us 3855600
+ 9639 × 5000 producing 48195000

= 52426521
