Alright, let's work through 12851578 times 64250036 step by step
12851578 × 64250036 = 64250036 × (12851578)
+ 64250036 × 8 resulting in 514000288
+ 64250036 × 70 producing 4497502520
+ 64250036 × 500 that results in 32125018000
+ 64250036 × 1000 yielding 64250036000
+ 64250036 × 50000 which equals 3212501800000
+ 64250036 × 800000 producing 51400028800000
+ 64250036 × 2000000 giving us 128500072000000
+ 64250036 × 10000000 resulting in 642500360000000

= 825714349156808
