No problem, we've got 3158 and 6778 to multiply
3158 × 6778 = 6778 × (3158)
+ 6778 × 8 which equals 54224
+ 6778 × 50 that is equal 338900
+ 6778 × 100 giving us 677800
+ 6778 × 3000 that equals 20334000

= 21404924
