Alright, let's work through 46421990 times 7640545 step by step
46421990 × 7640545 = 7640545 × (46421990)
+ 7640545 × 0 resulting in 0
+ 7640545 × 90 what gives us 687649050
+ 7640545 × 900 resulting in 6876490500
+ 7640545 × 1000 what gives us 7640545000
+ 7640545 × 20000 yielding 152810900000
+ 7640545 × 400000 that equals 3056218000000
+ 7640545 × 6000000 what gives us 45843270000000
+ 7640545 × 40000000 which equals 305621800000000

= 354689303584550
