51993969 ÷ 999 
Our goal is to divide 51993969 by 999.

Step 1:
999 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 999

Let's proceed to step 2:
999 can be fit into 51 0 times, resulting in a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Take the next digit (9) from the dividend and append it to 51, then repeat: 519 / 999

Let's proceed to step 3:
When dividing 519 by 999, we get 0 with a remainder of 519.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 519 after subtracting 0 from 519.
Grab the next digit (9) from the dividend, add it to 519, then carry on: 5199 / 999

Advancing to step 4:
5199 divided by 999 is 5 with a remainder of 204.
Write down 5 as next digit of the result. 
Result so far: 5.0
Deduct 4995 from 5199 and we're left with 204.
Append the next digit (3) from the dividend to 204 and continue with: 2043 / 999

On to step 5:
When dividing 2043 by 999, we get 2 with a remainder of 45.
Write down 2 as next digit of the result. 
Result so far: 52.0
Deduct 1998 from 2043 and we're left with 45.
Append the next digit (9) from the dividend to 45 and continue with: 459 / 999

Step 6:
999 goes into 459 0 times with a remainder of 459.
The number 0 becomes the next digit in our result. 
Result so far: 520.0
Deduct 0 from 459 and we're left with 459.
Append the next digit (6) from the dividend to 459 and continue with: 4596 / 999

Step 7:
999 can be fit into 4596 4 times, resulting in a remainder of 600.
Use 4 as the next digit of our solution. 
Result so far: 5204.0
If we take 3996 away from 4596, we end up with 600.
Bring next digit (9) of the dividend behind the 600 and repeat the process: 6009 / 999

Step 8:
If we divide 6009 by 999, we get 6 and a remainder of 15.
Put 6 as the next digit of the answer. 
Result so far: 52046.0
Deduct 5994 from 6009 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 9:
999 goes into 150 0 times with a remainder of 150.
The number 0 becomes the next digit in our result. 
Result so far: 52046.0
If we subtract 0 from 150, we get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Advancing to step 10:
When dividing 1500 by 999, we get 1 with a remainder of 501.
Put 1 as the next digit of the answer. 
Result so far: 52046.01
Subtract 999 from 1500 to get 501.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5010, and continue the process.

On to step 11:
If we divide 5010 by 999, we get 5 and a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 52046.015
If we take 4995 away from 5010, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 12:
The number 999 fits into 150 0 times, leaving a remainder of 150.
Record the quotient 0 as the next digit in the result. 
Result so far: 52046.015
Deduct 0 from 150 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Step 13:
When dividing 1500 by 999, we get 1 with a remainder of 501.
Write down 1 as next digit of the result. 
Result so far: 52046.01501
Subtracting 999 from 1500 leaves us with 501.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5010, and continue the process.

Moving on to step 14:
The number 999 fits into 5010 5 times, leaving a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 52046.015015
Subtract 4995 from 5010 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 15:
999 goes into 150 0 times with a remainder of 150.
The next digit of our result is 0. 
Result so far: 52046.015015
Subtract 0 from 150 to get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Step 16:
999 can be fit into 1500 1 times, resulting in a remainder of 501.
Write down 1 as next digit of the result. 
Result so far: 52046.01501501
If we take 999 away from 1500, we end up with 501.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5010, and continue the process.

Our division results in 52046.01501501 with a remaining 5.01e-07.