We're going to solve 1859 multiplied by 8600
1859 × 8600 = 8600 × (1859)
+ 8600 × 9 that is equal 77400
+ 8600 × 50 that equals 430000
+ 8600 × 800 what gives us 6880000
+ 8600 × 1000 yielding 8600000

= 15987400
