We're dividing 811521 by 77 
Let's see how many times 77 fits into 811521.

Let's proceed to step 1:
When dividing 8 by 77, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 77

Going ahead to step 2:
When dividing 81 by 77, we get 1 with a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 77 away from 81, we end up with 4.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 77

Step 3:
77 can be fit into 41 0 times, resulting in a remainder of 41.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Deduct 0 from 41 and we're left with 41.
Bring next digit (5) of the dividend behind the 41 and repeat the process: 415 / 77

Going ahead to step 4:
77 goes into 415 5 times with a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 105.0
The remainder is 30 after subtracting 385 from 415.
Grab the next digit (2) from the dividend, add it to 30, then carry on: 302 / 77

Step 5:
If we divide 302 by 77, we get 3 and a remainder of 71.
The next digit of our result is 3. 
Result so far: 1053.0
If we subtract 231 from 302, we get 71.
Bring next digit (1) of the dividend behind the 71 and repeat the process: 711 / 77

Advancing to step 6:
The number 77 fits into 711 9 times, leaving a remainder of 18.
The number 9 becomes the next digit in our result. 
Result so far: 10539.0
The remainder is 18 after subtracting 693 from 711.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 7:
77 can be fit into 180 2 times, resulting in a remainder of 26.
Write down 2 as next digit of the result. 
Result so far: 10539.2
The remainder is 26 after subtracting 154 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 8:
When dividing 260 by 77, we get 3 with a remainder of 29.
The number 3 becomes the next digit in our result. 
Result so far: 10539.23
If we take 231 away from 260, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 9:
When dividing 290 by 77, we get 3 with a remainder of 59.
The number 3 becomes the next digit in our result. 
Result so far: 10539.233
The remainder is 59 after subtracting 231 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

In conclusion, the division gives 10539.233 with a balance of 0.0059.