Alright, let's work through 20481087 times 20574700 step by step
20481087 × 20574700 = 20574700 × (20481087)
+ 20574700 × 7 that results in 144022900
+ 20574700 × 80 what gives us 1645976000
+ 20574700 × 000 yielding 0
+ 20574700 × 1000 producing 20574700000
+ 20574700 × 80000 what gives us 1645976000000
+ 20574700 × 400000 that results in 8229880000000
+ 20574700 × 0000000 yielding 0
+ 20574700 × 20000000 that equals 411494000000000

= 421392220698900
