Alright, let's work through 73271354 times 78109586 step by step
73271354 × 78109586 = 78109586 × (73271354)
+ 78109586 × 4 yielding 312438344
+ 78109586 × 50 giving us 3905479300
+ 78109586 × 300 resulting in 23432875800
+ 78109586 × 1000 producing 78109586000
+ 78109586 × 70000 yielding 5467671020000
+ 78109586 × 200000 producing 15621917200000
+ 78109586 × 3000000 that results in 234328758000000
+ 78109586 × 70000000 what gives us 5467671020000000

= 5723195126599444
