Alright, let's work through 78425578 times 61348002 step by step
78425578 × 61348002 = 61348002 × (78425578)
+ 61348002 × 8 producing 490784016
+ 61348002 × 70 that results in 4294360140
+ 61348002 × 500 giving us 30674001000
+ 61348002 × 5000 that results in 306740010000
+ 61348002 × 20000 that results in 1226960040000
+ 61348002 × 400000 yielding 24539200800000
+ 61348002 × 8000000 that results in 490784016000000
+ 61348002 × 70000000 which equals 4294360140000000

= 4811252515995156
