Let's divide 399429 by 23
We're looking to find how many times 23 goes into 399429.

Let's proceed to step 1:
The number 23 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 23

Moving on to step 2:
If we divide 39 by 23, we get 1 and a remainder of 16.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 23 from 39, we get 16.
Grab the next digit (9) from the dividend, add it to 16, then carry on: 169 / 23

Going ahead to step 3:
23 can be fit into 169 7 times, resulting in a remainder of 8.
Put 7 as the next digit of the answer. 
Result so far: 17.0
If we take 161 away from 169, we end up with 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 23

On to step 4:
The number 23 fits into 84 3 times, leaving a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 173.0
The remainder is 15 after subtracting 69 from 84.
Take the next digit (2) from the dividend and append it to 15, then repeat: 152 / 23

Step 5:
23 goes into 152 6 times with a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 1736.0
The remainder is 14 after subtracting 138 from 152.
Fetch the next digit (9) from the dividend, attach it to 14 and continue: 149 / 23

Step 6:
When dividing 149 by 23, we get 6 with a remainder of 11.
Use 6 as the next digit of our solution. 
Result so far: 17366.0
Deduct 138 from 149 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 7:
23 goes into 110 4 times with a remainder of 18.
Put 4 as the next digit of the answer. 
Result so far: 17366.4
Deduct 92 from 110 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 8:
When dividing 180 by 23, we get 7 with a remainder of 19.
Record the quotient 7 as the next digit in the result. 
Result so far: 17366.47
Deduct 161 from 180 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 9:
The number 23 fits into 190 8 times, leaving a remainder of 6.
The next digit of our result is 8. 
Result so far: 17366.478
If we subtract 184 from 190, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 10:
When dividing 60 by 23, we get 2 with a remainder of 14.
Use 2 as the next digit of our solution. 
Result so far: 17366.4782
If we subtract 46 from 60, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 11:
The number 23 fits into 140 6 times, leaving a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 17366.47826
Subtract 138 from 140 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 12:
When dividing 20 by 23, we get 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 17366.47826
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 13:
The number 23 fits into 200 8 times, leaving a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 17366.4782608
If we take 184 away from 200, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 14:
160 divided by 23 is 6 with a remainder of 22.
The next digit of our result is 6. 
Result so far: 17366.47826086
Subtract 138 from 160 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

The quotient of the division is 17366.47826086, and the remainder is 2.2e-08.