428973 ÷ 39 
We want to divide 428973 by 39.

Step 1:
The number 39 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 39

Step 2:
The number 39 fits into 42 1 times, leaving a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 39 from 42 and we're left with 3.
Grab the next digit (8) from the dividend, add it to 3, then carry on: 38 / 39

Moving on to step 3:
The number 39 fits into 38 0 times, leaving a remainder of 38.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Deduct 0 from 38 and we're left with 38.
Take the next digit (9) from the dividend and append it to 38, then repeat: 389 / 39

Step 4:
39 goes into 389 9 times with a remainder of 38.
Put 9 as the next digit of the answer. 
Result so far: 109.0
Subtracting 351 from 389 leaves us with 38.
Grab the next digit (7) from the dividend, add it to 38, then carry on: 387 / 39

On to step 5:
If we divide 387 by 39, we get 9 and a remainder of 36.
Record the quotient 9 as the next digit in the result. 
Result so far: 1099.0
Deduct 351 from 387 and we're left with 36.
Fetch the next digit (3) from the dividend, attach it to 36 and continue: 363 / 39

Advancing to step 6:
363 divided by 39 is 9 with a remainder of 12.
Use 9 as the next digit of our solution. 
Result so far: 10999.0
Subtracting 351 from 363 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.

Going ahead to step 7:
If we divide 120 by 39, we get 3 and a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 10999.3
Subtract 117 from 120 to get 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 8:
39 can be fit into 30 0 times, resulting in a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 10999.3
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 9:
39 goes into 300 7 times with a remainder of 27.
Use 7 as the next digit of our solution. 
Result so far: 10999.307
The remainder is 27 after subtracting 273 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Moving on to step 10:
When dividing 270 by 39, we get 6 with a remainder of 36.
The next digit of our result is 6. 
Result so far: 10999.3076
If we subtract 234 from 270, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 11:
360 divided by 39 is 9 with a remainder of 9.
Write down 9 as next digit of the result. 
Result so far: 10999.30769
If we subtract 351 from 360, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 12:
90 divided by 39 is 2 with a remainder of 12.
The next digit of our result is 2. 
Result so far: 10999.307692
If we take 78 away from 90, we end up 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.

Let's proceed to step 13:
39 goes into 120 3 times with a remainder of 3.
The next digit of our result is 3. 
Result so far: 10999.3076923
Deduct 117 from 120 and we're left 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.

Step 14:
30 divided by 39 is 0 with a remainder of 30.
The next digit of our result is 0. 
Result so far: 10999.3076923
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Our division results in 10999.3076923 with a remaining 3e-08.