Let's divide 343599 by 23
Our goal is to divide 343599 by 23.

On to step 1:
The number 23 fits into 3 0 times, leaving a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 23

Advancing to step 2:
23 can be fit into 34 1 times, resulting in a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 23 from 34 and we're left with 11.
Bring next digit (3) of the dividend behind the 11 and repeat the process: 113 / 23

Step 3:
23 goes into 113 4 times with a remainder of 21.
Write down 4 as next digit of the result. 
Result so far: 14.0
If we take 92 away from 113, we end up with 21.
Fetch the next digit (5) from the dividend, attach it to 21 and continue: 215 / 23

Step 4:
23 goes into 215 9 times with a remainder of 8.
Record the quotient 9 as the next digit in the result. 
Result so far: 149.0
The remainder is 8 after subtracting 207 from 215.
Append the next digit (9) from the dividend to 8 and continue with: 89 / 23

Advancing to step 5:
23 can be fit into 89 3 times, resulting in a remainder of 20.
Write down 3 as next digit of the result. 
Result so far: 1493.0
If we subtract 69 from 89, we get 20.
Include the next digit (9) from the dividend after 20, then repeat: 209 / 23

Moving on to step 6:
23 can be fit into 209 9 times, resulting in a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 14939.0
If we subtract 207 from 209, we 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.

On to step 7:
23 goes into 20 0 times with a remainder of 20.
The next digit of our result is 0. 
Result so far: 14939.0
Deduct 0 from 20 and we're left 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.

Advancing to step 8:
23 goes into 200 8 times with a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 14939.08
Subtracting 184 from 200 leaves us 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.

Going ahead to step 9:
23 can be fit into 160 6 times, resulting in a remainder of 22.
The next digit of our result is 6. 
Result so far: 14939.086
Subtracting 138 from 160 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 10:
The number 23 fits into 220 9 times, leaving a remainder of 13.
Put 9 as the next digit of the answer. 
Result so far: 14939.0869
Deduct 207 from 220 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 11:
When dividing 130 by 23, we get 5 with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 14939.08695
If we subtract 115 from 130, we 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.

Step 12:
150 divided by 23 is 6 with a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 14939.086956
Subtracting 138 from 150 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 13:
120 divided by 23 is 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 14939.0869565
If we subtract 115 from 120, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 14:
The number 23 fits into 50 2 times, leaving a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 14939.08695652
If we subtract 46 from 50, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 14939.08695652, with a leftover of 4e-09.