Alright, let's work through 75040657 times 24978509 step by step
75040657 × 24978509 = 24978509 × (75040657)
+ 24978509 × 7 producing 174849563
+ 24978509 × 50 producing 1248925450
+ 24978509 × 600 which equals 14987105400
+ 24978509 × 0000 which equals 0
+ 24978509 × 40000 giving us 999140360000
+ 24978509 × 000000 that equals 0
+ 24978509 × 5000000 producing 124892545000000
+ 24978509 × 70000000 giving us 1748495630000000

= 1874403726240413
