66644 ÷ 7 = 9520 R4
Let's divide 66644 by 7.

Step 1:
7 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 / 7

Step 2:
7 goes into 66 9 times with a remainder of 3.
Write down 9 as next digit of of the result. 
Result so far: 9
Subtract 63 from 66 to get 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 7

Step 3:
7 goes into 36 5 times with a remainder of 1.
Write down 5 as next digit of of the result. 
Result so far: 95
Subtract 35 from 36 to get 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 7

Step 4:
7 goes into 14 2 times with a remainder of 0.
Write down 2 as next digit of of the result. 
Result so far: 952
Subtract 14 from 14 to get 0.
Bring next digit (4) of the dividend behind the 0 and repeat the process: 4 / 7

Step 5:
7 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of of the result. 
Result so far: 9520
Subtract 0 from 4 to get 4.

The final result is 9520 with a remainder of 4.