Alright, let's work through 5921 times 3379 step by step
5921 × 3379 = 3379 × (5921)
+ 3379 × 1 yielding 3379
+ 3379 × 20 resulting in 67580
+ 3379 × 900 resulting in 3041100
+ 3379 × 5000 giving us 16895000

= 20007059
