No problem, we've got 7440 and 672 to multiply
7440 × 672 = 672 × (7440)
+ 672 × 0 what gives us 0
+ 672 × 40 which equals 26880
+ 672 × 400 that is equal 268800
+ 672 × 7000 yielding 4704000

= 4999680
