Alright, let's work through 73917317 times 64135391 step by step
73917317 × 64135391 = 64135391 × (73917317)
+ 64135391 × 7 producing 448947737
+ 64135391 × 10 that is equal 641353910
+ 64135391 × 300 that is equal 19240617300
+ 64135391 × 7000 that is equal 448947737000
+ 64135391 × 10000 that is equal 641353910000
+ 64135391 × 900000 yielding 57721851900000
+ 64135391 × 3000000 that equals 192406173000000
+ 64135391 × 70000000 which equals 4489477370000000

= 4740716027465947
