102020 divided by 39 
We're looking to find how many times 39 goes into 102020.

Step 1:
39 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 39

Advancing to step 2:
10 divided by 39 is 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 10, we get 10.
Grab the next digit (2) from the dividend, add it to 10, then carry on: 102 / 39

Step 3:
When dividing 102 by 39, we get 2 with a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 24 after subtracting 78 from 102.
Include the next digit (0) from the dividend after 24, then repeat: 240 / 39

Let's proceed to step 4:
39 can be fit into 240 6 times, resulting in a remainder of 6.
The next digit of our result is 6. 
Result so far: 26.0
Deduct 234 from 240 and we're left with 6.
Append the next digit (2) from the dividend to 6 and continue with: 62 / 39

Going ahead to step 5:
When dividing 62 by 39, we get 1 with a remainder of 23.
The next digit of our result is 1. 
Result so far: 261.0
If we subtract 39 from 62, we get 23.
Append the next digit (0) from the dividend to 23 and continue with: 230 / 39

Let's proceed to step 6:
39 can be fit into 230 5 times, resulting in a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 2615.0
The remainder is 35 after subtracting 195 from 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 7:
The number 39 fits into 350 8 times, leaving a remainder of 38.
Put 8 as the next digit of the answer. 
Result so far: 2615.8
Subtract 312 from 350 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 8:
If we divide 380 by 39, we get 9 and a remainder of 29.
Use 9 as the next digit of our solution. 
Result so far: 2615.89
Subtract 351 from 380 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Let's proceed to step 9:
290 divided by 39 is 7 with a remainder of 17.
Use 7 as the next digit of our solution. 
Result so far: 2615.897
Deduct 273 from 290 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 10:
The number 39 fits into 170 4 times, leaving a remainder of 14.
Record the quotient 4 as the next digit in the result. 
Result so far: 2615.8974
If we subtract 156 from 170, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 11:
140 divided by 39 is 3 with a remainder of 23.
The number 3 becomes the next digit in our result. 
Result so far: 2615.89743
Subtract 117 from 140 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 12:
If we divide 230 by 39, we get 5 and a remainder of 35.
The next digit of our result is 5. 
Result so far: 2615.897435
Subtracting 195 from 230 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 13:
350 divided by 39 is 8 with a remainder of 38.
Put 8 as the next digit of the answer. 
Result so far: 2615.8974358
If we take 312 away from 350, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 14:
If we divide 380 by 39, we get 9 and a remainder of 29.
The number 9 becomes the next digit in our result. 
Result so far: 2615.89743589
Subtract 351 from 380 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

The final result is 2615.89743589 with a remainder of 2.9e-08.