No problem, we've got 76620319 and 70747315 to multiply
76620319 × 70747315 = 70747315 × (76620319)
+ 70747315 × 9 what gives us 636725835
+ 70747315 × 10 yielding 707473150
+ 70747315 × 300 which equals 21224194500
+ 70747315 × 0000 which equals 0
+ 70747315 × 20000 resulting in 1414946300000
+ 70747315 × 600000 giving us 42448389000000
+ 70747315 × 6000000 yielding 424483890000000
+ 70747315 × 70000000 yielding 4952312050000000

= 5420681843693485
