We're going to solve 1340 multiplied by 3157
1340 × 3157 = 3157 × (1340)
+ 3157 × 0 what gives us 0
+ 3157 × 40 that is equal 126280
+ 3157 × 300 that equals 947100
+ 3157 × 1000 which equals 3157000

= 4230380
