Alright, let's work through 1641 times 5540 step by step
1641 × 5540 = 5540 × (1641)
+ 5540 × 1 that is equal 5540
+ 5540 × 40 what gives us 221600
+ 5540 × 600 resulting in 3324000
+ 5540 × 1000 that results in 5540000

= 9091140
