We're dividing 399391 by 55 
We're looking to find how many times 55 goes into 399391.

Advancing to step 1:
If we divide 3 by 55, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 55

Moving on to step 2:
If we divide 39 by 55, we get 0 and a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Take the next digit (9) from the dividend and append it to 39, then repeat: 399 / 55

On to step 3:
55 can be fit into 399 7 times, resulting in a remainder of 14.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtract 385 from 399 to get 14.
Take the next digit (3) from the dividend and append it to 14, then repeat: 143 / 55

Going ahead to step 4:
143 divided by 55 is 2 with a remainder of 33.
The next digit of our result is 2. 
Result so far: 72.0
Deduct 110 from 143 and we're left with 33.
Fetch the next digit (9) from the dividend, attach it to 33 and continue: 339 / 55

Advancing to step 5:
55 goes into 339 6 times with a remainder of 9.
Use 6 as the next digit of our solution. 
Result so far: 726.0
The remainder is 9 after subtracting 330 from 339.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 55

Moving on to step 6:
55 goes into 91 1 times with a remainder of 36.
The number 1 becomes the next digit in our result. 
Result so far: 7261.0
Deduct 55 from 91 and we're left with 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 7:
If we divide 360 by 55, we get 6 and a remainder of 30.
Write down 6 as next digit of the result. 
Result so far: 7261.6
Deduct 330 from 360 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
If we divide 300 by 55, we get 5 and a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 7261.65
Deduct 275 from 300 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 9:
55 goes into 250 4 times with a remainder of 30.
Record the quotient 4 as the next digit in the result. 
Result so far: 7261.654
Subtract 220 from 250 to 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.

Let's proceed to step 10:
55 can be fit into 300 5 times, resulting in a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 7261.6545
Subtract 275 from 300 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 11:
250 divided by 55 is 4 with a remainder of 30.
Put 4 as the next digit of the answer. 
Result so far: 7261.65454
If we take 220 away from 250, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 12:
When dividing 300 by 55, we get 5 with a remainder of 25.
The next digit of our result is 5. 
Result so far: 7261.654545
The remainder is 25 after subtracting 275 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 13:
250 divided by 55 is 4 with a remainder of 30.
The next digit of our result is 4. 
Result so far: 7261.6545454
If we take 220 away from 250, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 14:
300 divided by 55 is 5 with a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 7261.65454545
If we subtract 275 from 300, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

The final result is 7261.65454545 with a remainder of 2.5e-08.