Alright, let's work through 8140 times 4911 step by step
8140 × 4911 = 4911 × (8140)
+ 4911 × 0 that is equal 0
+ 4911 × 40 what gives us 196440
+ 4911 × 100 that is equal 491100
+ 4911 × 8000 which equals 39288000

= 39975540
