No problem, we've got 78909940 and 67940077 to multiply
78909940 × 67940077 = 67940077 × (78909940)
+ 67940077 × 0 what gives us 0
+ 67940077 × 40 resulting in 2717603080
+ 67940077 × 900 what gives us 61146069300
+ 67940077 × 9000 yielding 611460693000
+ 67940077 × 00000 resulting in 0
+ 67940077 × 900000 giving us 61146069300000
+ 67940077 × 8000000 that results in 543520616000000
+ 67940077 × 70000000 yielding 4755805390000000

= 5361147399665380
