We're going to solve 1787 multiplied by 7858
1787 × 7858 = 7858 × (1787)
+ 7858 × 7 producing 55006
+ 7858 × 80 that results in 628640
+ 7858 × 700 that equals 5500600
+ 7858 × 1000 what gives us 7858000

= 14042246
