Alright, let's work through 782491 times 1798239 step by step
782491 × 1798239 = 1798239 × (782491)
+ 1798239 × 1 producing 1798239
+ 1798239 × 90 that results in 161841510
+ 1798239 × 400 which equals 719295600
+ 1798239 × 2000 yielding 3596478000
+ 1798239 × 80000 yielding 143859120000
+ 1798239 × 700000 giving us 1258767300000

= 1407105833349
