Alright, let's work through 51304820 times 72257785 step by step
51304820 × 72257785 = 72257785 × (51304820)
+ 72257785 × 0 producing 0
+ 72257785 × 20 that results in 1445155700
+ 72257785 × 800 that results in 57806228000
+ 72257785 × 4000 that is equal 289031140000
+ 72257785 × 00000 producing 0
+ 72257785 × 300000 giving us 21677335500000
+ 72257785 × 1000000 that equals 72257785000000
+ 72257785 × 50000000 what gives us 3612889250000000

= 3707172653023700
