Alright, let's work through 76688724 times 66934486 step by step
76688724 × 66934486 = 66934486 × (76688724)
+ 66934486 × 4 giving us 267737944
+ 66934486 × 20 that is equal 1338689720
+ 66934486 × 700 that equals 46854140200
+ 66934486 × 8000 producing 535475888000
+ 66934486 × 80000 which equals 5354758880000
+ 66934486 × 600000 which equals 40160691600000
+ 66934486 × 6000000 that results in 401606916000000
+ 66934486 × 70000000 yielding 4685414020000000

= 5133120322935864
