Alright, let's work through 18181945 times 35461874 step by step
18181945 × 35461874 = 35461874 × (18181945)
+ 35461874 × 5 that is equal 177309370
+ 35461874 × 40 giving us 1418474960
+ 35461874 × 900 that results in 31915686600
+ 35461874 × 1000 resulting in 35461874000
+ 35461874 × 80000 producing 2836949920000
+ 35461874 × 100000 that equals 3546187400000
+ 35461874 × 8000000 which equals 283694992000000
+ 35461874 × 10000000 giving us 354618740000000

= 644765842664930
