No problem, we've got 4478 and 1644 to multiply
4478 × 1644 = 1644 × (4478)
+ 1644 × 8 yielding 13152
+ 1644 × 70 that is equal 115080
+ 1644 × 400 resulting in 657600
+ 1644 × 4000 resulting in 6576000

= 7361832
