No problem, we've got 99768209 and 78638608 to multiply
99768209 × 78638608 = 78638608 × (99768209)
+ 78638608 × 9 that is equal 707747472
+ 78638608 × 00 that results in 0
+ 78638608 × 200 resulting in 15727721600
+ 78638608 × 8000 what gives us 629108864000
+ 78638608 × 60000 giving us 4718316480000
+ 78638608 × 700000 what gives us 55047025600000
+ 78638608 × 9000000 what gives us 707747472000000
+ 78638608 × 90000000 resulting in 7077474720000000

= 7845633078413072
