We're dividing 51390354 by 571 
Let's see how many times 571 fits into 51390354.

Advancing to step 1:
When dividing 5 by 571, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 571

Going ahead to step 2:
571 goes into 51 0 times with a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Include the next digit (3) from the dividend after 51, then repeat: 513 / 571

Moving on to step 3:
If we divide 513 by 571, we get 0 and a remainder of 513.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 513 to get 513.
Bring next digit (9) of the dividend behind the 513 and repeat the process: 5139 / 571

Advancing to step 4:
571 can be fit into 5139 9 times, resulting in a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we subtract 5139 from 5139, we get 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 571

On to step 5:
571 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 90.0
The remainder is 0 after subtracting 0 from 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 571

Let's proceed to step 6:
When dividing 3 by 571, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 900.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 571

Advancing to step 7:
The number 571 fits into 35 0 times, leaving a remainder of 35.
The next digit of our result is 0. 
Result so far: 9000.0
The remainder is 35 after subtracting 0 from 35.
Take the next digit (4) from the dividend and append it to 35, then repeat: 354 / 571

Let's proceed to step 8:
571 goes into 354 0 times with a remainder of 354.
Put 0 as the next digit of the answer. 
Result so far: 90000.0
If we take 0 away from 354, we end up with 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

Step 9:
When dividing 3540 by 571, we get 6 with a remainder of 114.
The number 6 becomes the next digit in our result. 
Result so far: 90000.6
Subtracting 3426 from 3540 leaves us with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Advancing to step 10:
571 goes into 1140 1 times with a remainder of 569.
Put 1 as the next digit of the answer. 
Result so far: 90000.61
If we take 571 away from 1140, we end up with 569.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5690, and continue the process.

Going ahead to step 11:
The number 571 fits into 5690 9 times, leaving a remainder of 551.
The number 9 becomes the next digit in our result. 
Result so far: 90000.619
If we take 5139 away from 5690, we end up with 551.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5510, and continue the process.

Let's proceed to step 12:
5510 divided by 571 is 9 with a remainder of 371.
Use 9 as the next digit of our solution. 
Result so far: 90000.6199
If we subtract 5139 from 5510, we get 371.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3710, and continue the process.

Our division results in 90000.6199 with a remaining 0.00371.