Alright, let's work through 36399118 times 18921386 step by step
36399118 × 18921386 = 18921386 × (36399118)
+ 18921386 × 8 giving us 151371088
+ 18921386 × 10 yielding 189213860
+ 18921386 × 100 that is equal 1892138600
+ 18921386 × 9000 that equals 170292474000
+ 18921386 × 90000 producing 1702924740000
+ 18921386 × 300000 resulting in 5676415800000
+ 18921386 × 6000000 which equals 113528316000000
+ 18921386 × 30000000 resulting in 567641580000000

= 688721761737548
