No problem, we've got 6428 and 1107 to multiply
6428 × 1107 = 1107 × (6428)
+ 1107 × 8 that results in 8856
+ 1107 × 20 that equals 22140
+ 1107 × 400 that is equal 442800
+ 1107 × 6000 what gives us 6642000

= 7115796
