Alright, let's work through 4129 times 4928 step by step
4129 × 4928 = 4928 × (4129)
+ 4928 × 9 what gives us 44352
+ 4928 × 20 that results in 98560
+ 4928 × 100 giving us 492800
+ 4928 × 4000 yielding 19712000

= 20347712
