428660 ÷ 23 
Let's see how many times 23 fits into 428660.

Step 1:
The number 23 fits into 4 0 times, leaving a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 23

Moving on to step 2:
23 can be fit into 42 1 times, resulting in a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 23 from 42 to get 19.
Fetch the next digit (8) from the dividend, attach it to 19 and continue: 198 / 23

Let's proceed to step 3:
The number 23 fits into 198 8 times, leaving a remainder of 14.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
If we subtract 184 from 198, we get 14.
Fetch the next digit (6) from the dividend, attach it to 14 and continue: 146 / 23

Advancing to step 4:
23 goes into 146 6 times with a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 186.0
If we take 138 away from 146, we end up with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 23

Advancing to step 5:
86 divided by 23 is 3 with a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 1863.0
If we subtract 69 from 86, we get 17.
Grab the next digit (0) from the dividend, add it to 17, then carry on: 170 / 23

Let's proceed to step 6:
23 goes into 170 7 times with a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 18637.0
Deduct 161 from 170 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 7:
When dividing 90 by 23, we get 3 with a remainder of 21.
Use 3 as the next digit of our solution. 
Result so far: 18637.3
Subtracting 69 from 90 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 8:
23 can be fit into 210 9 times, resulting in a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 18637.39
Subtracting 207 from 210 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 9:
23 goes into 30 1 times with a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 18637.391
Subtract 23 from 30 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 10:
If we divide 70 by 23, we get 3 and a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 18637.3913
Subtract 69 from 70 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 11:
If we divide 10 by 23, we get 0 and a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 18637.3913
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 12:
The number 23 fits into 100 4 times, leaving a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 18637.391304
Subtracting 92 from 100 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 13:
23 goes into 80 3 times with a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 18637.3913043
Subtracting 69 from 80 leaves us 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.

On to step 14:
The number 23 fits into 110 4 times, leaving a remainder of 18.
The number 4 becomes the next digit in our result. 
Result so far: 18637.39130434
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.

In conclusion, the division gives 18637.39130434 with a balance of 1.8e-08.