No problem, we've got 78485838 and 21016124 to multiply
78485838 × 21016124 = 21016124 × (78485838)
+ 21016124 × 8 resulting in 168128992
+ 21016124 × 30 what gives us 630483720
+ 21016124 × 800 which equals 16812899200
+ 21016124 × 5000 yielding 105080620000
+ 21016124 × 80000 resulting in 1681289920000
+ 21016124 × 400000 what gives us 8406449600000
+ 21016124 × 8000000 giving us 168128992000000
+ 21016124 × 70000000 resulting in 1471128680000000

= 1649468103651912
