No problem, we've got 80407639 and 45242133 to multiply
80407639 × 45242133 = 45242133 × (80407639)
+ 45242133 × 9 that equals 407179197
+ 45242133 × 30 which equals 1357263990
+ 45242133 × 600 giving us 27145279800
+ 45242133 × 7000 resulting in 316694931000
+ 45242133 × 00000 that equals 0
+ 45242133 × 400000 that results in 18096853200000
+ 45242133 × 0000000 what gives us 0
+ 45242133 × 80000000 that is equal 3619370640000000

= 3637813097853987
