No problem, we've got 7881 and 5426 to multiply
7881 × 5426 = 5426 × (7881)
+ 5426 × 1 what gives us 5426
+ 5426 × 80 that is equal 434080
+ 5426 × 800 which equals 4340800
+ 5426 × 7000 that equals 37982000

= 42762306
