Alright, let's work through 3577 times 3639 step by step
3577 × 3639 = 3639 × (3577)
+ 3639 × 7 producing 25473
+ 3639 × 70 that results in 254730
+ 3639 × 500 that equals 1819500
+ 3639 × 3000 giving us 10917000

= 13016703
