Alright, let's work through 69490847 times 39971647 step by step
69490847 × 39971647 = 39971647 × (69490847)
+ 39971647 × 7 that equals 279801529
+ 39971647 × 40 which equals 1598865880
+ 39971647 × 800 giving us 31977317600
+ 39971647 × 0000 giving us 0
+ 39971647 × 90000 resulting in 3597448230000
+ 39971647 × 400000 that is equal 15988658800000
+ 39971647 × 9000000 resulting in 359744823000000
+ 39971647 × 60000000 which equals 2398298820000000

= 2777663606015009
