We look at the division of 8539977 by 407 
We're looking to find how many times 407 goes into 8539977.

Advancing to step 1:
The number 407 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 407

Advancing to step 2:
The number 407 fits into 85 0 times, leaving a remainder of 85.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 85 to get 85.
Include the next digit (3) from the dividend after 85, then repeat: 853 / 407

Step 3:
407 goes into 853 2 times with a remainder of 39.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 814 from 853, we get 39.
Append the next digit (9) from the dividend to 39 and continue with: 399 / 407

Moving on to step 4:
407 can be fit into 399 0 times, resulting in a remainder of 399.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
If we subtract 0 from 399, we get 399.
Include the next digit (9) from the dividend after 399, then repeat: 3999 / 407

Advancing to step 5:
407 can be fit into 3999 9 times, resulting in a remainder of 336.
Put 9 as the next digit of the answer. 
Result so far: 209.0
Deduct 3663 from 3999 and we're left with 336.
Append the next digit (7) from the dividend to 336 and continue with: 3367 / 407

Let's proceed to step 6:
The number 407 fits into 3367 8 times, leaving a remainder of 111.
Put 8 as the next digit of the answer. 
Result so far: 2098.0
Subtracting 3256 from 3367 leaves us with 111.
Take the next digit (7) from the dividend and append it to 111, then repeat: 1117 / 407

Advancing to step 7:
The number 407 fits into 1117 2 times, leaving a remainder of 303.
Use 2 as the next digit of our solution. 
Result so far: 20982.0
If we subtract 814 from 1117, we get 303.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3030, and continue the process.

Going ahead to step 8:
407 can be fit into 3030 7 times, resulting in a remainder of 181.
Record the quotient 7 as the next digit in the result. 
Result so far: 20982.7
The remainder is 181 after subtracting 2849 from 3030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

Going ahead to step 9:
1810 divided by 407 is 4 with a remainder of 182.
Put 4 as the next digit of the answer. 
Result so far: 20982.74
Subtracting 1628 from 1810 leaves us with 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

On to step 10:
407 can be fit into 1820 4 times, resulting in a remainder of 192.
Record the quotient 4 as the next digit in the result. 
Result so far: 20982.744
If we take 1628 away from 1820, we end up with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

After the division, we end up with 20982.744 and a remainder of 0.0192.