Alright, let's work through 53397391 times 12447182 step by step
53397391 × 12447182 = 12447182 × (53397391)
+ 12447182 × 1 resulting in 12447182
+ 12447182 × 90 giving us 1120246380
+ 12447182 × 300 resulting in 3734154600
+ 12447182 × 7000 which equals 87130274000
+ 12447182 × 90000 what gives us 1120246380000
+ 12447182 × 300000 that results in 3734154600000
+ 12447182 × 3000000 that results in 37341546000000
+ 12447182 × 50000000 which equals 622359100000000

= 664647044102162
