Alright, let's work through 81964023 times 79037029 step by step
81964023 × 79037029 = 79037029 × (81964023)
+ 79037029 × 3 that results in 237111087
+ 79037029 × 20 that is equal 1580740580
+ 79037029 × 000 yielding 0
+ 79037029 × 4000 that is equal 316148116000
+ 79037029 × 60000 resulting in 4742221740000
+ 79037029 × 900000 resulting in 71133326100000
+ 79037029 × 1000000 yielding 79037029000000
+ 79037029 × 80000000 which equals 6322962320000000

= 6478192862807667
