Alright, let's work through 56380391 times 54797543 step by step
56380391 × 54797543 = 54797543 × (56380391)
+ 54797543 × 1 what gives us 54797543
+ 54797543 × 90 what gives us 4931778870
+ 54797543 × 300 giving us 16439262900
+ 54797543 × 0000 which equals 0
+ 54797543 × 80000 giving us 4383803440000
+ 54797543 × 300000 what gives us 16439262900000
+ 54797543 × 6000000 that is equal 328785258000000
+ 54797543 × 50000000 that equals 2739877150000000

= 3089506900179313
