Alright, let's work through 48123573 times 71799985 step by step
48123573 × 71799985 = 71799985 × (48123573)
+ 71799985 × 3 that results in 215399955
+ 71799985 × 70 that equals 5025998950
+ 71799985 × 500 which equals 35899992500
+ 71799985 × 3000 that results in 215399955000
+ 71799985 × 20000 that equals 1435999700000
+ 71799985 × 100000 that results in 7179998500000
+ 71799985 × 8000000 producing 574399880000000
+ 71799985 × 40000000 resulting in 2871999400000000

= 3455271819546405
