We look at the division of 54125897 by 820 
We want to divide 54125897 by 820.

Step 1:
If we divide 5 by 820, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 820

Going ahead to step 2:
If we divide 54 by 820, we get 0 and a remainder of 54.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 54, we get 54.
Include the next digit (1) from the dividend after 54, then repeat: 541 / 820

Advancing to step 3:
If we divide 541 by 820, we get 0 and a remainder of 541.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 541, we get 541.
Take the next digit (2) from the dividend and append it to 541, then repeat: 5412 / 820

Step 4:
820 can be fit into 5412 6 times, resulting in a remainder of 492.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Deduct 4920 from 5412 and we're left with 492.
Grab the next digit (5) from the dividend, add it to 492, then carry on: 4925 / 820

Step 5:
When dividing 4925 by 820, we get 6 with a remainder of 5.
Use 6 as the next digit of our solution. 
Result so far: 66.0
Deduct 4920 from 4925 and we're left with 5.
Append the next digit (8) from the dividend to 5 and continue with: 58 / 820

Advancing to step 6:
When dividing 58 by 820, we get 0 with a remainder of 58.
Put 0 as the next digit of the answer. 
Result so far: 660.0
If we subtract 0 from 58, we get 58.
Grab the next digit (9) from the dividend, add it to 58, then carry on: 589 / 820

On to step 7:
589 divided by 820 is 0 with a remainder of 589.
The next digit of our result is 0. 
Result so far: 6600.0
Subtract 0 from 589 to get 589.
Include the next digit (7) from the dividend after 589, then repeat: 5897 / 820

Moving on to step 8:
The number 820 fits into 5897 7 times, leaving a remainder of 157.
Write down 7 as next digit of the result. 
Result so far: 66007.0
The remainder is 157 after subtracting 5740 from 5897.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1570, and continue the process.

On to step 9:
1570 divided by 820 is 1 with a remainder of 750.
The number 1 becomes the next digit in our result. 
Result so far: 66007.1
The remainder is 750 after subtracting 820 from 1570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7500, and continue the process.

On to step 10:
7500 divided by 820 is 9 with a remainder of 120.
Use 9 as the next digit of our solution. 
Result so far: 66007.19
If we take 7380 away from 7500, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 11:
820 can be fit into 1200 1 times, resulting in a remainder of 380.
The next digit of our result is 1. 
Result so far: 66007.191
If we subtract 820 from 1200, we get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Going ahead to step 12:
If we divide 3800 by 820, we get 4 and a remainder of 520.
The number 4 becomes the next digit in our result. 
Result so far: 66007.1914
If we subtract 3280 from 3800, we get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Going ahead to step 13:
If we divide 5200 by 820, we get 6 and a remainder of 280.
The number 6 becomes the next digit in our result. 
Result so far: 66007.19146
The remainder is 280 after subtracting 4920 from 5200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Advancing to step 14:
820 goes into 2800 3 times with a remainder of 340.
Put 3 as the next digit of the answer. 
Result so far: 66007.191463
If we subtract 2460 from 2800, we get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Going ahead to step 15:
3400 divided by 820 is 4 with a remainder of 120.
Use 4 as the next digit of our solution. 
Result so far: 66007.1914634
Deduct 3280 from 3400 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 16:
820 can be fit into 1200 1 times, resulting in a remainder of 380.
Use 1 as the next digit of our solution. 
Result so far: 66007.19146341
Subtract 820 from 1200 to get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

The final outcome is 66007.19146341, with a leftover of 3.8e-07.