Alright, let's work through 3921 times 5658 step by step
3921 × 5658 = 5658 × (3921)
+ 5658 × 1 yielding 5658
+ 5658 × 20 yielding 113160
+ 5658 × 900 which equals 5092200
+ 5658 × 3000 that is equal 16974000

= 22185018
