Alright, let's work through 2139 times 1659 step by step
2139 × 1659 = 1659 × (2139)
+ 1659 × 9 resulting in 14931
+ 1659 × 30 producing 49770
+ 1659 × 100 that equals 165900
+ 1659 × 2000 producing 3318000

= 3548601
