Alright, let's work through 81336026 times 45349189 step by step
81336026 × 45349189 = 45349189 × (81336026)
+ 45349189 × 6 yielding 272095134
+ 45349189 × 20 giving us 906983780
+ 45349189 × 000 that equals 0
+ 45349189 × 6000 that results in 272095134000
+ 45349189 × 30000 that is equal 1360475670000
+ 45349189 × 300000 producing 13604756700000
+ 45349189 × 1000000 resulting in 45349189000000
+ 45349189 × 80000000 that is equal 3627935120000000

= 3688522815582914
