Alright, let's work through 75089503 times 72143704 step by step
75089503 × 72143704 = 72143704 × (75089503)
+ 72143704 × 3 that results in 216431112
+ 72143704 × 00 what gives us 0
+ 72143704 × 500 what gives us 36071852000
+ 72143704 × 9000 what gives us 649293336000
+ 72143704 × 80000 that results in 5771496320000
+ 72143704 × 000000 that is equal 0
+ 72143704 × 5000000 resulting in 360718520000000
+ 72143704 × 70000000 which equals 5050059280000000

= 5417234877939112
