We look at the division of 430123 by 39 
We want to figure out the number of times 430123 can be divided by 39.

Step 1:
When dividing 4 by 39, we get 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 39

Moving on to step 2:
39 can be fit into 43 1 times, resulting in a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 39 from 43 and we're left with 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 39

On to step 3:
When dividing 40 by 39, we get 1 with a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Subtracting 39 from 40 leaves us with 1.
Fetch the next digit (1) from the dividend, attach it to 1 and continue: 11 / 39

Advancing to step 4:
39 can be fit into 11 0 times, resulting in a remainder of 11.
The number 0 becomes the next digit in our result. 
Result so far: 110.0
If we take 0 away from 11, we end up with 11.
Fetch the next digit (2) from the dividend, attach it to 11 and continue: 112 / 39

On to step 5:
39 goes into 112 2 times with a remainder of 34.
The next digit of our result is 2. 
Result so far: 1102.0
Subtract 78 from 112 to get 34.
Grab the next digit (3) from the dividend, add it to 34, then carry on: 343 / 39

Step 6:
39 goes into 343 8 times with a remainder of 31.
Write down 8 as next digit of the result. 
Result so far: 11028.0
The remainder is 31 after subtracting 312 from 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Step 7:
39 goes into 310 7 times with a remainder of 37.
The next digit of our result is 7. 
Result so far: 11028.7
Subtract 273 from 310 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Step 8:
370 divided by 39 is 9 with a remainder of 19.
Write down 9 as next digit of the result. 
Result so far: 11028.79
Subtracting 351 from 370 leaves us 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.

Step 9:
39 can be fit into 190 4 times, resulting in a remainder of 34.
Put 4 as the next digit of the answer. 
Result so far: 11028.794
Subtracting 156 from 190 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 10:
If we divide 340 by 39, we get 8 and a remainder of 28.
Use 8 as the next digit of our solution. 
Result so far: 11028.7948
Subtract 312 from 340 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 11:
280 divided by 39 is 7 with a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 11028.79487
The remainder is 7 after subtracting 273 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 12:
70 divided by 39 is 1 with a remainder of 31.
The number 1 becomes the next digit in our result. 
Result so far: 11028.794871
Subtract 39 from 70 to get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 13:
When dividing 310 by 39, we get 7 with a remainder of 37.
Put 7 as the next digit of the answer. 
Result so far: 11028.7948717
Subtract 273 from 310 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 14:
370 divided by 39 is 9 with a remainder of 19.
The next digit of our result is 9. 
Result so far: 11028.79487179
Subtract 351 from 370 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

After the division, we end up with 11028.79487179 and a remainder of 1.9e-08.