No problem, we've got 1644 and 9276 to multiply
1644 × 9276 = 9276 × (1644)
+ 9276 × 4 producing 37104
+ 9276 × 40 which equals 371040
+ 9276 × 600 which equals 5565600
+ 9276 × 1000 that equals 9276000

= 15249744
