No problem, we've got 78420738 and 50425921 to multiply
78420738 × 50425921 = 50425921 × (78420738)
+ 50425921 × 8 which equals 403407368
+ 50425921 × 30 resulting in 1512777630
+ 50425921 × 700 what gives us 35298144700
+ 50425921 × 0000 which equals 0
+ 50425921 × 20000 that is equal 1008518420000
+ 50425921 × 400000 giving us 20170368400000
+ 50425921 × 8000000 that is equal 403407368000000
+ 50425921 × 70000000 which equals 3529814470000000

= 3954437939149698
