Alright, let's work through 9138 times 6990 step by step
9138 × 6990 = 6990 × (9138)
+ 6990 × 8 resulting in 55920
+ 6990 × 30 which equals 209700
+ 6990 × 100 which equals 699000
+ 6990 × 9000 that equals 62910000

= 63874620
