No problem, we've got 8835 and 7890 to multiply
8835 × 7890 = 7890 × (8835)
+ 7890 × 5 resulting in 39450
+ 7890 × 30 what gives us 236700
+ 7890 × 800 what gives us 6312000
+ 7890 × 8000 yielding 63120000

= 69708150
