No problem, we've got 78637547 and 89079564 to multiply
78637547 × 89079564 = 89079564 × (78637547)
+ 89079564 × 7 yielding 623556948
+ 89079564 × 40 that equals 3563182560
+ 89079564 × 500 that equals 44539782000
+ 89079564 × 7000 producing 623556948000
+ 89079564 × 30000 producing 2672386920000
+ 89079564 × 600000 yielding 53447738400000
+ 89079564 × 8000000 producing 712636512000000
+ 89079564 × 70000000 producing 6235569480000000

= 7004998400789508
