Alright, let's work through 73958671 times 64053399 step by step
73958671 × 64053399 = 64053399 × (73958671)
+ 64053399 × 1 that equals 64053399
+ 64053399 × 70 resulting in 4483737930
+ 64053399 × 600 resulting in 38432039400
+ 64053399 × 8000 that equals 512427192000
+ 64053399 × 50000 that results in 3202669950000
+ 64053399 × 900000 yielding 57648059100000
+ 64053399 × 3000000 resulting in 192160197000000
+ 64053399 × 70000000 what gives us 4483737930000000

= 4737304263072729
