We look at the division of 51642346 by 999 
We're looking to find how many times 999 goes into 51642346.

Step 1:
999 goes into 5 0 times with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 999

On to step 2:
51 divided by 999 is 0 with a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Append the next digit (6) from the dividend to 51 and continue with: 516 / 999

Going ahead to step 3:
The number 999 fits into 516 0 times, leaving a remainder of 516.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 516, we end up with 516.
Append the next digit (4) from the dividend to 516 and continue with: 5164 / 999

Moving on to step 4:
If we divide 5164 by 999, we get 5 and a remainder of 169.
Write down 5 as next digit of the result. 
Result so far: 5.0
If we subtract 4995 from 5164, we get 169.
Grab the next digit (2) from the dividend, add it to 169, then carry on: 1692 / 999

Step 5:
The number 999 fits into 1692 1 times, leaving a remainder of 693.
Use 1 as the next digit of our solution. 
Result so far: 51.0
The remainder is 693 after subtracting 999 from 1692.
Fetch the next digit (3) from the dividend, attach it to 693 and continue: 6933 / 999

Going ahead to step 6:
999 goes into 6933 6 times with a remainder of 939.
The next digit of our result is 6. 
Result so far: 516.0
Subtracting 5994 from 6933 leaves us with 939.
Include the next digit (4) from the dividend after 939, then repeat: 9394 / 999

Moving on to step 7:
When dividing 9394 by 999, we get 9 with a remainder of 403.
Write down 9 as next digit of the result. 
Result so far: 5169.0
Deduct 8991 from 9394 and we're left with 403.
Append the next digit (6) from the dividend to 403 and continue with: 4036 / 999

Step 8:
The number 999 fits into 4036 4 times, leaving a remainder of 40.
Put 4 as the next digit of the answer. 
Result so far: 51694.0
Subtracting 3996 from 4036 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 9:
The number 999 fits into 400 0 times, leaving a remainder of 400.
Record the quotient 0 as the next digit in the result. 
Result so far: 51694.0
Deduct 0 from 400 and we're left with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Advancing to step 10:
When dividing 4000 by 999, we get 4 with a remainder of 4.
The next digit of our result is 4. 
Result so far: 51694.04
The remainder is 4 after subtracting 3996 from 4000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 11:
40 divided by 999 is 0 with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 51694.04
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 12:
999 goes into 400 0 times with a remainder of 400.
Write down 0 as next digit of the result. 
Result so far: 51694.04
Subtract 0 from 400 to get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final outcome is 51694.04, with a leftover of 0.004.