Alright, let's work through 8603 times 540 step by step
8603 × 540 = 540 × (8603)
+ 540 × 3 what gives us 1620
+ 540 × 00 giving us 0
+ 540 × 600 producing 324000
+ 540 × 8000 which equals 4320000

= 4645620
