Alright, let's work through 1596 times 513 step by step
1596 × 513 = 513 × (1596)
+ 513 × 6 that is equal 3078
+ 513 × 90 that results in 46170
+ 513 × 500 that equals 256500
+ 513 × 1000 yielding 513000

= 818748
