66404 ÷ 9 = 7378 R2
No problem, we've got 66404 and 9 for the division.

Step 1:
9 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 6 to get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 9

Step 2:
9 goes into 66 7 times with a remainder of 3.
Write down 7 as next digit of of the result. 
Result so far: 7
Subtract 63 from 66 to get 3.
Bring next digit (4) of the dividend behind the 3 and repeat the process: 34 / 9

Step 3:
9 goes into 34 3 times with a remainder of 7.
Write down 3 as next digit of of the result. 
Result so far: 73
Subtract 27 from 34 to get 7.
Bring next digit (0) of the dividend behind the 7 and repeat the process: 70 / 9

Step 4:
9 goes into 70 7 times with a remainder of 7.
Write down 7 as next digit of of the result. 
Result so far: 737
Subtract 63 from 70 to get 7.
Bring next digit (4) of the dividend behind the 7 and repeat the process: 74 / 9

Step 5:
9 goes into 74 8 times with a remainder of 2.
Write down 8 as next digit of of the result. 
Result so far: 7378
Subtract 72 from 74 to get 2.

The final result is 7378 with a remainder of 2.