No problem, we've got 8231 and 1388 to multiply
8231 × 1388 = 1388 × (8231)
+ 1388 × 1 what gives us 1388
+ 1388 × 30 what gives us 41640
+ 1388 × 200 which equals 277600
+ 1388 × 8000 which equals 11104000

= 11424628
