Alright, let's work through 72619606 times 72889728 step by step
72619606 × 72889728 = 72889728 × (72619606)
+ 72889728 × 6 which equals 437338368
+ 72889728 × 00 that equals 0
+ 72889728 × 600 yielding 43733836800
+ 72889728 × 9000 that equals 656007552000
+ 72889728 × 10000 that is equal 728897280000
+ 72889728 × 600000 what gives us 43733836800000
+ 72889728 × 2000000 giving us 145779456000000
+ 72889728 × 70000000 which equals 5102280960000000

= 5293223328807168
