Alright, let's work through 47712654 times 40081789 step by step
47712654 × 40081789 = 40081789 × (47712654)
+ 40081789 × 4 that results in 160327156
+ 40081789 × 50 what gives us 2004089450
+ 40081789 × 600 resulting in 24049073400
+ 40081789 × 2000 which equals 80163578000
+ 40081789 × 10000 what gives us 400817890000
+ 40081789 × 700000 that results in 28057252300000
+ 40081789 × 7000000 giving us 280572523000000
+ 40081789 × 40000000 giving us 1603271560000000

= 1912408530258006
