We look at the division of 6172210 by 999 
Let's see how many times 999 fits into 6172210.

Going ahead to step 1:
999 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 999

Step 2:
When dividing 61 by 999, we get 0 with a remainder of 61.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 61 to get 61.
Take the next digit (7) from the dividend and append it to 61, then repeat: 617 / 999

On to step 3:
When dividing 617 by 999, we get 0 with a remainder of 617.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 617, we get 617.
Grab the next digit (2) from the dividend, add it to 617, then carry on: 6172 / 999

Step 4:
When dividing 6172 by 999, we get 6 with a remainder of 178.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Deduct 5994 from 6172 and we're left with 178.
Fetch the next digit (2) from the dividend, attach it to 178 and continue: 1782 / 999

Going ahead to step 5:
1782 divided by 999 is 1 with a remainder of 783.
Write down 1 as next digit of the result. 
Result so far: 61.0
Deduct 999 from 1782 and we're left with 783.
Take the next digit (1) from the dividend and append it to 783, then repeat: 7831 / 999

Going ahead to step 6:
The number 999 fits into 7831 7 times, leaving a remainder of 838.
The number 7 becomes the next digit in our result. 
Result so far: 617.0
Subtract 6993 from 7831 to get 838.
Take the next digit (0) from the dividend and append it to 838, then repeat: 8380 / 999

Going ahead to step 7:
999 goes into 8380 8 times with a remainder of 388.
The next digit of our result is 8. 
Result so far: 6178.0
Deduct 7992 from 8380 and we're left with 388.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

On to step 8:
When dividing 3880 by 999, we get 3 with a remainder of 883.
The next digit of our result is 3. 
Result so far: 6178.3
If we subtract 2997 from 3880, we get 883.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8830, and continue the process.

Step 9:
8830 divided by 999 is 8 with a remainder of 838.
Put 8 as the next digit of the answer. 
Result so far: 6178.38
If we subtract 7992 from 8830, we get 838.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8380, and continue the process.

Moving on to step 10:
If we divide 8380 by 999, we get 8 and a remainder of 388.
The next digit of our result is 8. 
Result so far: 6178.388
Subtracting 7992 from 8380 leaves us with 388.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

The final result is 6178.388 with a remainder of 0.0388.