Alright, let's work through 54253945 times 12293522 step by step
54253945 × 12293522 = 12293522 × (54253945)
+ 12293522 × 5 which equals 61467610
+ 12293522 × 40 what gives us 491740880
+ 12293522 × 900 producing 11064169800
+ 12293522 × 3000 which equals 36880566000
+ 12293522 × 50000 what gives us 614676100000
+ 12293522 × 200000 what gives us 2458704400000
+ 12293522 × 4000000 that is equal 49174088000000
+ 12293522 × 50000000 producing 614676100000000

= 666972066444290
