Alright, let's work through 8140 times 1230 step by step
8140 × 1230 = 1230 × (8140)
+ 1230 × 0 that results in 0
+ 1230 × 40 that results in 49200
+ 1230 × 100 which equals 123000
+ 1230 × 8000 resulting in 9840000

= 10012200
