No problem, we've got 79951985 and 84001009 to multiply
79951985 × 84001009 = 84001009 × (79951985)
+ 84001009 × 5 resulting in 420005045
+ 84001009 × 80 what gives us 6720080720
+ 84001009 × 900 giving us 75600908100
+ 84001009 × 1000 what gives us 84001009000
+ 84001009 × 50000 which equals 4200050450000
+ 84001009 × 900000 that is equal 75600908100000
+ 84001009 × 9000000 what gives us 756009081000000
+ 84001009 × 70000000 giving us 5880070630000000

= 6716047411552865
