No problem, we've got 2013 and 3187 to multiply
2013 × 3187 = 3187 × (2013)
+ 3187 × 3 what gives us 9561
+ 3187 × 10 giving us 31870
+ 3187 × 000 that equals 0
+ 3187 × 2000 that equals 6374000

= 6415431
