Alright, let's work through 5478 times 9821 step by step
5478 × 9821 = 9821 × (5478)
+ 9821 × 8 that results in 78568
+ 9821 × 70 producing 687470
+ 9821 × 400 yielding 3928400
+ 9821 × 5000 what gives us 49105000

= 53799438
