We're dividing 77210061 by 810 
Our goal is to divide 77210061 by 810.

Advancing to step 1:
The number 810 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 810

Step 2:
810 goes into 77 0 times with a remainder of 77.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 77, we get 77.
Include the next digit (2) from the dividend after 77, then repeat: 772 / 810

Moving on to step 3:
772 divided by 810 is 0 with a remainder of 772.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 772 and we're left with 772.
Fetch the next digit (1) from the dividend, attach it to 772 and continue: 7721 / 810

Moving on to step 4:
If we divide 7721 by 810, we get 9 and a remainder of 431.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtract 7290 from 7721 to get 431.
Grab the next digit (0) from the dividend, add it to 431, then carry on: 4310 / 810

Step 5:
4310 divided by 810 is 5 with a remainder of 260.
The number 5 becomes the next digit in our result. 
Result so far: 95.0
Deduct 4050 from 4310 and we're left with 260.
Bring next digit (0) of the dividend behind the 260 and repeat the process: 2600 / 810

Step 6:
When dividing 2600 by 810, we get 3 with a remainder of 170.
The number 3 becomes the next digit in our result. 
Result so far: 953.0
If we subtract 2430 from 2600, we get 170.
Fetch the next digit (6) from the dividend, attach it to 170 and continue: 1706 / 810

Step 7:
The number 810 fits into 1706 2 times, leaving a remainder of 86.
Record the quotient 2 as the next digit in the result. 
Result so far: 9532.0
If we take 1620 away from 1706, we end up with 86.
Include the next digit (1) from the dividend after 86, then repeat: 861 / 810

Step 8:
When dividing 861 by 810, we get 1 with a remainder of 51.
Write down 1 as next digit of the result. 
Result so far: 95321.0
If we subtract 810 from 861, we get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Moving on to step 9:
When dividing 510 by 810, we get 0 with a remainder of 510.
Use 0 as the next digit of our solution. 
Result so far: 95321.0
If we subtract 0 from 510, we get 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Advancing to step 10:
When dividing 5100 by 810, we get 6 with a remainder of 240.
Put 6 as the next digit of the answer. 
Result so far: 95321.06
Subtracting 4860 from 5100 leaves us with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Step 11:
810 can be fit into 2400 2 times, resulting in a remainder of 780.
Use 2 as the next digit of our solution. 
Result so far: 95321.062
If we take 1620 away from 2400, we end up with 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7800, and continue the process.

Advancing to step 12:
810 can be fit into 7800 9 times, resulting in a remainder of 510.
Put 9 as the next digit of the answer. 
Result so far: 95321.0629
Deduct 7290 from 7800 and we're left with 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

On to step 13:
810 goes into 5100 6 times with a remainder of 240.
The number 6 becomes the next digit in our result. 
Result so far: 95321.06296
If we subtract 4860 from 5100, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

On to step 14:
810 can be fit into 2400 2 times, resulting in a remainder of 780.
The next digit of our result is 2. 
Result so far: 95321.062962
The remainder is 780 after subtracting 1620 from 2400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7800, and continue the process.

Moving on to step 15:
The number 810 fits into 7800 9 times, leaving a remainder of 510.
Write down 9 as next digit of the result. 
Result so far: 95321.0629629
Deduct 7290 from 7800 and we're left with 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

On to step 16:
If we divide 5100 by 810, we get 6 and a remainder of 240.
Put 6 as the next digit of the answer. 
Result so far: 95321.06296296
If we subtract 4860 from 5100, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

In conclusion, the division gives 95321.06296296 with a balance of 2.4e-07.