No problem, we've got 1401 and 1715 to multiply
1401 × 1715 = 1715 × (1401)
+ 1715 × 1 what gives us 1715
+ 1715 × 00 what gives us 0
+ 1715 × 400 producing 686000
+ 1715 × 1000 producing 1715000

= 2402715
