No problem, we've got 83741578 and 64434687 to multiply
83741578 × 64434687 = 64434687 × (83741578)
+ 64434687 × 8 that equals 515477496
+ 64434687 × 70 that equals 4510428090
+ 64434687 × 500 resulting in 32217343500
+ 64434687 × 1000 that results in 64434687000
+ 64434687 × 40000 yielding 2577387480000
+ 64434687 × 700000 that results in 45104280900000
+ 64434687 × 3000000 that equals 193304061000000
+ 64434687 × 80000000 yielding 5154774960000000

= 5395862367316086
