We're going to solve 1642 multiplied by 1637
1642 × 1637 = 1637 × (1642)
+ 1637 × 2 that equals 3274
+ 1637 × 40 what gives us 65480
+ 1637 × 600 that equals 982200
+ 1637 × 1000 yielding 1637000

= 2687954
