Alright, let's work through 9993 times 7148 step by step
9993 × 7148 = 7148 × (9993)
+ 7148 × 3 giving us 21444
+ 7148 × 90 producing 643320
+ 7148 × 900 that equals 6433200
+ 7148 × 9000 giving us 64332000

= 71429964
