No problem, we've got 3977 and 6578 to multiply
3977 × 6578 = 6578 × (3977)
+ 6578 × 7 that equals 46046
+ 6578 × 70 that is equal 460460
+ 6578 × 900 what gives us 5920200
+ 6578 × 3000 yielding 19734000

= 26160706
