Alright, let's work through 79428720 times 73678342 step by step
79428720 × 73678342 = 73678342 × (79428720)
+ 73678342 × 0 what gives us 0
+ 73678342 × 20 which equals 1473566840
+ 73678342 × 700 that is equal 51574839400
+ 73678342 × 8000 which equals 589426736000
+ 73678342 × 20000 producing 1473566840000
+ 73678342 × 400000 which equals 29471336800000
+ 73678342 × 9000000 yielding 663105078000000
+ 73678342 × 70000000 giving us 5157483940000000

= 5852176396782240
