Alright, let's work through 72674387 times 91221113 step by step
72674387 × 91221113 = 91221113 × (72674387)
+ 91221113 × 7 that results in 638547791
+ 91221113 × 80 yielding 7297689040
+ 91221113 × 300 that is equal 27366333900
+ 91221113 × 4000 that results in 364884452000
+ 91221113 × 70000 producing 6385477910000
+ 91221113 × 600000 that is equal 54732667800000
+ 91221113 × 2000000 which equals 182442226000000
+ 91221113 × 70000000 giving us 6385477910000000

= 6629438468732731
