No problem, we've got 4907488 and 1617655 to multiply
4907488 × 1617655 = 1617655 × (4907488)
+ 1617655 × 8 that equals 12941240
+ 1617655 × 80 giving us 129412400
+ 1617655 × 400 giving us 647062000
+ 1617655 × 7000 that is equal 11323585000
+ 1617655 × 00000 which equals 0
+ 1617655 × 900000 resulting in 1455889500000
+ 1617655 × 4000000 producing 6470620000000

= 7938622500640
