Alright, let's work through 6990 times 9516 step by step
6990 × 9516 = 9516 × (6990)
+ 9516 × 0 that equals 0
+ 9516 × 90 giving us 856440
+ 9516 × 900 that equals 8564400
+ 9516 × 6000 producing 57096000

= 66516840
