No problem, we've got 7789 and 8878 to multiply
7789 × 8878 = 8878 × (7789)
+ 8878 × 9 yielding 79902
+ 8878 × 80 yielding 710240
+ 8878 × 700 that is equal 6214600
+ 8878 × 7000 that results in 62146000

= 69150742
