No problem, we've got 7971 and 2778 to multiply
7971 × 2778 = 2778 × (7971)
+ 2778 × 1 that is equal 2778
+ 2778 × 70 what gives us 194460
+ 2778 × 900 yielding 2500200
+ 2778 × 7000 that is equal 19446000

= 22143438
