Alright, let's work through 1582 times 860 step by step
1582 × 860 = 860 × (1582)
+ 860 × 2 that is equal 1720
+ 860 × 80 yielding 68800
+ 860 × 500 which equals 430000
+ 860 × 1000 what gives us 860000

= 1360520
