We're going to solve 3693 multiplied by 1251
3693 × 1251 = 1251 × (3693)
+ 1251 × 3 what gives us 3753
+ 1251 × 90 which equals 112590
+ 1251 × 600 that is equal 750600
+ 1251 × 3000 giving us 3753000

= 4619943
