Alright, let's work through 3591 times 9644 step by step
3591 × 9644 = 9644 × (3591)
+ 9644 × 1 giving us 9644
+ 9644 × 90 what gives us 867960
+ 9644 × 500 that equals 4822000
+ 9644 × 3000 that is equal 28932000

= 34631604
