Alright, let's work through 77998080 times 25048 step by step
77998080 × 25048 = 25048 × (77998080)
+ 25048 × 0 yielding 0
+ 25048 × 80 giving us 2003840
+ 25048 × 000 producing 0
+ 25048 × 8000 yielding 200384000
+ 25048 × 90000 producing 2254320000
+ 25048 × 900000 that is equal 22543200000
+ 25048 × 7000000 what gives us 175336000000
+ 25048 × 70000000 yielding 1753360000000

= 1953695907840
