We divide 120399 by 39
We're looking to find how many times 39 goes into 120399.

Let's proceed to step 1:
39 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 39

Moving on to step 2:
The number 39 fits into 12 0 times, leaving a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Take the next digit (0) from the dividend and append it to 12, then repeat: 120 / 39

Going ahead to step 3:
The number 39 fits into 120 3 times, leaving a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 117 away from 120, we end up with 3.
Include the next digit (3) from the dividend after 3, then repeat: 33 / 39

Step 4:
The number 39 fits into 33 0 times, leaving a remainder of 33.
Put 0 as the next digit of the answer. 
Result so far: 30.0
Subtracting 0 from 33 leaves us with 33.
Take the next digit (9) from the dividend and append it to 33, then repeat: 339 / 39

On to step 5:
39 can be fit into 339 8 times, resulting in a remainder of 27.
Put 8 as the next digit of the answer. 
Result so far: 308.0
If we take 312 away from 339, we end up with 27.
Include the next digit (9) from the dividend after 27, then repeat: 279 / 39

Step 6:
39 can be fit into 279 7 times, resulting in a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 3087.0
Subtracting 273 from 279 leaves us with 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 7:
60 divided by 39 is 1 with a remainder of 21.
Record the quotient 1 as the next digit in the result. 
Result so far: 3087.1
Deduct 39 from 60 and we're left 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.

Let's proceed to step 8:
39 goes into 210 5 times with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 3087.15
Deduct 195 from 210 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 9:
The number 39 fits into 150 3 times, leaving a remainder of 33.
Record the quotient 3 as the next digit in the result. 
Result so far: 3087.153
Subtracting 117 from 150 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Advancing to step 10:
If we divide 330 by 39, we get 8 and a remainder of 18.
The number 8 becomes the next digit in our result. 
Result so far: 3087.1538
Subtract 312 from 330 to get 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 11:
If we divide 180 by 39, we get 4 and a remainder of 24.
Write down 4 as next digit of the result. 
Result so far: 3087.15384
The remainder is 24 after subtracting 156 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 12:
39 goes into 240 6 times with a remainder of 6.
The number 6 becomes the next digit in our result. 
Result so far: 3087.153846
If we subtract 234 from 240, 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.

Let's proceed to step 13:
60 divided by 39 is 1 with a remainder of 21.
Write down 1 as next digit of the result. 
Result so far: 3087.1538461
Deduct 39 from 60 and we're left 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.

On to step 14:
210 divided by 39 is 5 with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 3087.15384615
Subtracting 195 from 210 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The quotient of the division is 3087.15384615, and the remainder is 1.5e-08.