No problem, we've got 1403 and 7500 to multiply
1403 × 7500 = 7500 × (1403)
+ 7500 × 3 what gives us 22500
+ 7500 × 00 yielding 0
+ 7500 × 400 producing 3000000
+ 7500 × 1000 giving us 7500000

= 10522500
