Alright, let's work through 1398 times 7039 step by step
1398 × 7039 = 7039 × (1398)
+ 7039 × 8 that results in 56312
+ 7039 × 90 that results in 633510
+ 7039 × 300 yielding 2111700
+ 7039 × 1000 producing 7039000

= 9840522
