Alright, let's work through 16418671 times 81338022 step by step
16418671 × 81338022 = 81338022 × (16418671)
+ 81338022 × 1 resulting in 81338022
+ 81338022 × 70 what gives us 5693661540
+ 81338022 × 600 yielding 48802813200
+ 81338022 × 8000 what gives us 650704176000
+ 81338022 × 10000 that is equal 813380220000
+ 81338022 × 400000 that equals 32535208800000
+ 81338022 × 6000000 giving us 488028132000000
+ 81338022 × 10000000 which equals 813380220000000

= 1335462223008762
