We're going to solve 4978 multiplied by 8639
4978 × 8639 = 8639 × (4978)
+ 8639 × 8 what gives us 69112
+ 8639 × 70 producing 604730
+ 8639 × 900 producing 7775100
+ 8639 × 4000 producing 34556000

= 43004942
