Alright, let's work through 4139 times 9570 step by step
4139 × 9570 = 9570 × (4139)
+ 9570 × 9 which equals 86130
+ 9570 × 30 that results in 287100
+ 9570 × 100 what gives us 957000
+ 9570 × 4000 yielding 38280000

= 39610230
