We look at the division of 398399 by 54 
We're looking to find how many times 54 goes into 398399.

Moving on to step 1:
The number 54 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 54

Advancing to step 2:
54 can be fit into 39 0 times, resulting in a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Bring next digit (8) of the dividend behind the 39 and repeat the process: 398 / 54

Advancing to step 3:
54 can be fit into 398 7 times, resulting in a remainder of 20.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Deduct 378 from 398 and we're left with 20.
Fetch the next digit (3) from the dividend, attach it to 20 and continue: 203 / 54

On to step 4:
203 divided by 54 is 3 with a remainder of 41.
Write down 3 as next digit of the result. 
Result so far: 73.0
Subtracting 162 from 203 leaves us with 41.
Take the next digit (9) from the dividend and append it to 41, then repeat: 419 / 54

Moving on to step 5:
419 divided by 54 is 7 with a remainder of 41.
Write down 7 as next digit of the result. 
Result so far: 737.0
Subtracting 378 from 419 leaves us with 41.
Take the next digit (9) from the dividend and append it to 41, then repeat: 419 / 54

On to step 6:
The number 54 fits into 419 7 times, leaving a remainder of 41.
Record the quotient 7 as the next digit in the result. 
Result so far: 7377.0
The remainder is 41 after subtracting 378 from 419.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

On to step 7:
The number 54 fits into 410 7 times, leaving a remainder of 32.
The next digit of our result is 7. 
Result so far: 7377.7
The remainder is 32 after subtracting 378 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 8:
54 goes into 320 5 times with a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 7377.75
Deduct 270 from 320 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 9:
The number 54 fits into 500 9 times, leaving a remainder of 14.
The number 9 becomes the next digit in our result. 
Result so far: 7377.759
If we subtract 486 from 500, 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 10:
54 can be fit into 140 2 times, resulting in a remainder of 32.
Use 2 as the next digit of our solution. 
Result so far: 7377.7592
Deduct 108 from 140 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 11:
54 can be fit into 320 5 times, resulting in a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 7377.75925
Subtracting 270 from 320 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 12:
If we divide 500 by 54, we get 9 and a remainder of 14.
The number 9 becomes the next digit in our result. 
Result so far: 7377.759259
If we take 486 away from 500, we end up with 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 13:
54 can be fit into 140 2 times, resulting in a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 7377.7592592
If we subtract 108 from 140, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 14:
If we divide 320 by 54, we get 5 and a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 7377.75925925
If we take 270 away from 320, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Our division results in 7377.75925925 with a remaining 5e-08.