No problem, we've got 9889 and 7644 to multiply
9889 × 7644 = 7644 × (9889)
+ 7644 × 9 which equals 68796
+ 7644 × 80 that equals 611520
+ 7644 × 800 that equals 6115200
+ 7644 × 9000 that equals 68796000

= 75591516
