Alright, let's work through 1540 times 1073 step by step
1540 × 1073 = 1073 × (1540)
+ 1073 × 0 which equals 0
+ 1073 × 40 producing 42920
+ 1073 × 500 resulting in 536500
+ 1073 × 1000 that results in 1073000

= 1652420
