Alright, let's work through 18672021 times 20782580 step by step
18672021 × 20782580 = 20782580 × (18672021)
+ 20782580 × 1 producing 20782580
+ 20782580 × 20 yielding 415651600
+ 20782580 × 000 which equals 0
+ 20782580 × 2000 what gives us 41565160000
+ 20782580 × 70000 producing 1454780600000
+ 20782580 × 600000 resulting in 12469548000000
+ 20782580 × 8000000 resulting in 166260640000000
+ 20782580 × 10000000 what gives us 207825800000000

= 388052770194180
