Alright, let's work through 3615 times 5678 step by step
3615 × 5678 = 5678 × (3615)
+ 5678 × 5 giving us 28390
+ 5678 × 10 that results in 56780
+ 5678 × 600 giving us 3406800
+ 5678 × 3000 yielding 17034000

= 20525970
