We look at the division of 143863 by 39 
Our goal is to divide 143863 by 39.

Advancing to step 1:
If we divide 1 by 39, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Append the next digit (4) from the dividend to 1 and continue with: 14 / 39

Moving on to step 2:
39 can be fit into 14 0 times, resulting in a remainder of 14.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 14, we get 14.
Take the next digit (3) from the dividend and append it to 14, then repeat: 143 / 39

Moving on to step 3:
The number 39 fits into 143 3 times, leaving a remainder of 26.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we take 117 away from 143, we end up with 26.
Fetch the next digit (8) from the dividend, attach it to 26 and continue: 268 / 39

Step 4:
268 divided by 39 is 6 with a remainder of 34.
Record the quotient 6 as the next digit in the result. 
Result so far: 36.0
Subtract 234 from 268 to get 34.
Append the next digit (6) from the dividend to 34 and continue with: 346 / 39

Advancing to step 5:
39 can be fit into 346 8 times, resulting in a remainder of 34.
The number 8 becomes the next digit in our result. 
Result so far: 368.0
Subtracting 312 from 346 leaves us with 34.
Include the next digit (3) from the dividend after 34, then repeat: 343 / 39

Let's proceed to step 6:
When dividing 343 by 39, we get 8 with a remainder of 31.
Record the quotient 8 as the next digit in the result. 
Result so far: 3688.0
Subtract 312 from 343 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.

Moving on to step 7:
If we divide 310 by 39, we get 7 and a remainder of 37.
The next digit of our result is 7. 
Result so far: 3688.7
If we subtract 273 from 310, we 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.

Advancing to step 8:
If we divide 370 by 39, we get 9 and a remainder of 19.
Write down 9 as next digit of the result. 
Result so far: 3688.79
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.

Advancing to step 9:
39 goes into 190 4 times with a remainder of 34.
Record the quotient 4 as the next digit in the result. 
Result so far: 3688.794
The remainder is 34 after subtracting 156 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 10:
The number 39 fits into 340 8 times, leaving a remainder of 28.
The next digit of our result is 8. 
Result so far: 3688.7948
Deduct 312 from 340 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 11:
If we divide 280 by 39, we get 7 and a remainder of 7.
Write down 7 as next digit of the result. 
Result so far: 3688.79487
If we subtract 273 from 280, we 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.

Moving on to step 12:
When dividing 70 by 39, we get 1 with a remainder of 31.
The next digit of our result is 1. 
Result so far: 3688.794871
If we take 39 away from 70, we end up with 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:
39 can be fit into 310 7 times, resulting in a remainder of 37.
The next digit of our result is 7. 
Result so far: 3688.7948717
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.

Advancing to step 14:
When dividing 370 by 39, we get 9 with a remainder of 19.
Put 9 as the next digit of the answer. 
Result so far: 3688.79487179
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.

Our division results in 3688.79487179 with a remaining 1.9e-08.