No problem, we've got 84294378 and 78797875 to multiply
84294378 × 78797875 = 78797875 × (84294378)
+ 78797875 × 8 that is equal 630383000
+ 78797875 × 70 that equals 5515851250
+ 78797875 × 300 which equals 23639362500
+ 78797875 × 4000 giving us 315191500000
+ 78797875 × 90000 which equals 7091808750000
+ 78797875 × 200000 that equals 15759575000000
+ 78797875 × 4000000 which equals 315191500000000
+ 78797875 × 80000000 that results in 6303830000000000

= 6642217860846750
