Alright, let's work through 8138 times 438 step by step
8138 × 438 = 438 × (8138)
+ 438 × 8 which equals 3504
+ 438 × 30 giving us 13140
+ 438 × 100 giving us 43800
+ 438 × 8000 that results in 3504000

= 3564444
