No problem, we've got 78061640 and 78840439 to multiply
78061640 × 78840439 = 78840439 × (78061640)
+ 78840439 × 0 that results in 0
+ 78840439 × 40 producing 3153617560
+ 78840439 × 600 giving us 47304263400
+ 78840439 × 1000 giving us 78840439000
+ 78840439 × 60000 which equals 4730426340000
+ 78840439 × 000000 which equals 0
+ 78840439 × 8000000 giving us 630723512000000
+ 78840439 × 70000000 resulting in 5518830730000000

= 6154413966659960
