No problem, we've got 4479 and 1764 to multiply
4479 × 1764 = 1764 × (4479)
+ 1764 × 9 what gives us 15876
+ 1764 × 70 what gives us 123480
+ 1764 × 400 giving us 705600
+ 1764 × 4000 producing 7056000

= 7900956
