16668 ÷ 9 = 1852 R0
We're going to perform division on 16668 with 9 as the divisor.

Step 1:
9 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 1 to get 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 9

Step 2:
9 goes into 16 1 times with a remainder of 7.
Write down 1 as next digit of of the result. 
Result so far: 1
Subtract 9 from 16 to get 7.
Bring next digit (6) of the dividend behind the 7 and repeat the process: 76 / 9

Step 3:
9 goes into 76 8 times with a remainder of 4.
Write down 8 as next digit of of the result. 
Result so far: 18
Subtract 72 from 76 to get 4.
Bring next digit (6) of the dividend behind the 4 and repeat the process: 46 / 9

Step 4:
9 goes into 46 5 times with a remainder of 1.
Write down 5 as next digit of of the result. 
Result so far: 185
Subtract 45 from 46 to get 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 9

Step 5:
9 goes into 18 2 times with a remainder of 0.
Write down 2 as next digit of of the result. 
Result so far: 1852
Subtract 18 from 18 to get 0.

The final result is 1852 with a remainder of 0.