Alright, let's work through 73123843 times 42515873 step by step
73123843 × 42515873 = 42515873 × (73123843)
+ 42515873 × 3 producing 127547619
+ 42515873 × 40 that is equal 1700634920
+ 42515873 × 800 giving us 34012698400
+ 42515873 × 3000 resulting in 127547619000
+ 42515873 × 20000 producing 850317460000
+ 42515873 × 100000 that results in 4251587300000
+ 42515873 × 3000000 resulting in 127547619000000
+ 42515873 × 70000000 that equals 2976111110000000

= 3108924022259939
