No problem, we've got 5428 and 1338 to multiply
5428 × 1338 = 1338 × (5428)
+ 1338 × 8 giving us 10704
+ 1338 × 20 that is equal 26760
+ 1338 × 400 yielding 535200
+ 1338 × 5000 that equals 6690000

= 7262664
