99770538 ÷ 813 
We're looking to find how many times 813 goes into 99770538.

On to step 1:
The number 813 fits into 9 0 times, leaving a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 813

Moving on to step 2:
The number 813 fits into 99 0 times, leaving a remainder of 99.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 99 to get 99.
Append the next digit (7) from the dividend to 99 and continue with: 997 / 813

Moving on to step 3:
If we divide 997 by 813, we get 1 and a remainder of 184.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 813 from 997 to get 184.
Bring next digit (7) of the dividend behind the 184 and repeat the process: 1847 / 813

Let's proceed to step 4:
If we divide 1847 by 813, we get 2 and a remainder of 221.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we subtract 1626 from 1847, we get 221.
Include the next digit (0) from the dividend after 221, then repeat: 2210 / 813

On to step 5:
When dividing 2210 by 813, we get 2 with a remainder of 584.
Put 2 as the next digit of the answer. 
Result so far: 122.0
If we take 1626 away from 2210, we end up with 584.
Bring next digit (5) of the dividend behind the 584 and repeat the process: 5845 / 813

Let's proceed to step 6:
813 goes into 5845 7 times with a remainder of 154.
Put 7 as the next digit of the answer. 
Result so far: 1227.0
Subtracting 5691 from 5845 leaves us with 154.
Fetch the next digit (3) from the dividend, attach it to 154 and continue: 1543 / 813

Moving on to step 7:
If we divide 1543 by 813, we get 1 and a remainder of 730.
Use 1 as the next digit of our solution. 
Result so far: 12271.0
The remainder is 730 after subtracting 813 from 1543.
Fetch the next digit (8) from the dividend, attach it to 730 and continue: 7308 / 813

On to step 8:
When dividing 7308 by 813, we get 8 with a remainder of 804.
Put 8 as the next digit of the answer. 
Result so far: 122718.0
If we take 6504 away from 7308, we end up with 804.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8040, and continue the process.

Step 9:
The number 813 fits into 8040 9 times, leaving a remainder of 723.
Record the quotient 9 as the next digit in the result. 
Result so far: 122718.9
Deduct 7317 from 8040 and we're left with 723.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7230, and continue the process.

Advancing to step 10:
If we divide 7230 by 813, we get 8 and a remainder of 726.
The number 8 becomes the next digit in our result. 
Result so far: 122718.98
Deduct 6504 from 7230 and we're left with 726.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7260, and continue the process.

Step 11:
When dividing 7260 by 813, we get 8 with a remainder of 756.
Use 8 as the next digit of our solution. 
Result so far: 122718.988
Subtracting 6504 from 7260 leaves us with 756.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7560, and continue the process.

The final outcome is 122718.988, with a leftover of 0.0756.