Let's divide 3987780 by 439
We want to divide 3987780 by 439.

Advancing to step 1:
The number 439 fits into 3 0 times, leaving a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 439

Moving on to step 2:
439 goes into 39 0 times with a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Grab the next digit (8) from the dividend, add it to 39, then carry on: 398 / 439

Advancing to step 3:
439 goes into 398 0 times with a remainder of 398.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 398 leaves us with 398.
Fetch the next digit (7) from the dividend, attach it to 398 and continue: 3987 / 439

On to step 4:
The number 439 fits into 3987 9 times, leaving a remainder of 36.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtract 3951 from 3987 to get 36.
Append the next digit (7) from the dividend to 36 and continue with: 367 / 439

Moving on to step 5:
439 goes into 367 0 times with a remainder of 367.
The number 0 becomes the next digit in our result. 
Result so far: 90.0
If we subtract 0 from 367, we get 367.
Take the next digit (8) from the dividend and append it to 367, then repeat: 3678 / 439

Going ahead to step 6:
3678 divided by 439 is 8 with a remainder of 166.
Record the quotient 8 as the next digit in the result. 
Result so far: 908.0
The remainder is 166 after subtracting 3512 from 3678.
Bring next digit (0) of the dividend behind the 166 and repeat the process: 1660 / 439

Advancing to step 7:
The number 439 fits into 1660 3 times, leaving a remainder of 343.
The next digit of our result is 3. 
Result so far: 9083.0
Subtract 1317 from 1660 to get 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3430, and continue the process.

Let's proceed to step 8:
439 goes into 3430 7 times with a remainder of 357.
The number 7 becomes the next digit in our result. 
Result so far: 9083.7
Deduct 3073 from 3430 and we're left with 357.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3570, and continue the process.

Advancing to step 9:
If we divide 3570 by 439, we get 8 and a remainder of 58.
Put 8 as the next digit of the answer. 
Result so far: 9083.78
The remainder is 58 after subtracting 3512 from 3570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 10:
If we divide 580 by 439, we get 1 and a remainder of 141.
Put 1 as the next digit of the answer. 
Result so far: 9083.781
The remainder is 141 after subtracting 439 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

Going ahead to step 11:
1410 divided by 439 is 3 with a remainder of 93.
Use 3 as the next digit of our solution. 
Result so far: 9083.7813
Subtract 1317 from 1410 to get 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Step 12:
439 can be fit into 930 2 times, resulting in a remainder of 52.
The number 2 becomes the next digit in our result. 
Result so far: 9083.78132
The remainder is 52 after subtracting 878 from 930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 13:
When dividing 520 by 439, we get 1 with a remainder of 81.
Write down 1 as next digit of the result. 
Result so far: 9083.781321
The remainder is 81 after subtracting 439 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

On to step 14:
If we divide 810 by 439, we get 1 and a remainder of 371.
Record the quotient 1 as the next digit in the result. 
Result so far: 9083.7813211
Subtracting 439 from 810 leaves us with 371.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3710, and continue the process.

After the division, we end up with 9083.7813211 and a remainder of 3.71e-06.