No problem, we've got 16494774 and 40683286 to multiply
16494774 × 40683286 = 40683286 × (16494774)
+ 40683286 × 4 which equals 162733144
+ 40683286 × 70 that is equal 2847830020
+ 40683286 × 700 that results in 28478300200
+ 40683286 × 4000 resulting in 162733144000
+ 40683286 × 90000 that results in 3661495740000
+ 40683286 × 400000 yielding 16273314400000
+ 40683286 × 6000000 which equals 244099716000000
+ 40683286 × 10000000 which equals 406832860000000

= 671061608147364
