We look at the division of 78770353 by 831 
Let's see how many times 831 fits into 78770353.

Step 1:
831 goes into 7 0 times with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 831

Going ahead to step 2:
78 divided by 831 is 0 with a remainder of 78.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 78 after subtracting 0 from 78.
Fetch the next digit (7) from the dividend, attach it to 78 and continue: 787 / 831

Going ahead to step 3:
If we divide 787 by 831, we get 0 and a remainder of 787.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 787, we end up with 787.
Append the next digit (7) from the dividend to 787 and continue with: 7877 / 831

Moving on to step 4:
The number 831 fits into 7877 9 times, leaving a remainder of 398.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we take 7479 away from 7877, we end up with 398.
Take the next digit (0) from the dividend and append it to 398, then repeat: 3980 / 831

Let's proceed to step 5:
3980 divided by 831 is 4 with a remainder of 656.
The number 4 becomes the next digit in our result. 
Result so far: 94.0
Subtract 3324 from 3980 to get 656.
Take the next digit (3) from the dividend and append it to 656, then repeat: 6563 / 831

Going ahead to step 6:
6563 divided by 831 is 7 with a remainder of 746.
The next digit of our result is 7. 
Result so far: 947.0
Subtracting 5817 from 6563 leaves us with 746.
Append the next digit (5) from the dividend to 746 and continue with: 7465 / 831

Going ahead to step 7:
If we divide 7465 by 831, we get 8 and a remainder of 817.
The number 8 becomes the next digit in our result. 
Result so far: 9478.0
If we take 6648 away from 7465, we end up with 817.
Grab the next digit (3) from the dividend, add it to 817, then carry on: 8173 / 831

Let's proceed to step 8:
If we divide 8173 by 831, we get 9 and a remainder of 694.
Use 9 as the next digit of our solution. 
Result so far: 94789.0
Subtract 7479 from 8173 to get 694.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6940, and continue the process.

On to step 9:
The number 831 fits into 6940 8 times, leaving a remainder of 292.
Write down 8 as next digit of the result. 
Result so far: 94789.8
Subtracting 6648 from 6940 leaves us with 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Moving on to step 10:
The number 831 fits into 2920 3 times, leaving a remainder of 427.
Use 3 as the next digit of our solution. 
Result so far: 94789.83
If we subtract 2493 from 2920, we get 427.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4270, and continue the process.

Moving on to step 11:
The number 831 fits into 4270 5 times, leaving a remainder of 115.
The next digit of our result is 5. 
Result so far: 94789.835
If we take 4155 away from 4270, we end up with 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Advancing to step 12:
If we divide 1150 by 831, we get 1 and a remainder of 319.
Put 1 as the next digit of the answer. 
Result so far: 94789.8351
If we subtract 831 from 1150, we get 319.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3190, and continue the process.

Advancing to step 13:
3190 divided by 831 is 3 with a remainder of 697.
Use 3 as the next digit of our solution. 
Result so far: 94789.83513
Deduct 2493 from 3190 and we're left with 697.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6970, and continue the process.

On to step 14:
6970 divided by 831 is 8 with a remainder of 322.
The next digit of our result is 8. 
Result so far: 94789.835138
If we subtract 6648 from 6970, we get 322.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3220, and continue the process.

Advancing to step 15:
831 goes into 3220 3 times with a remainder of 727.
Put 3 as the next digit of the answer. 
Result so far: 94789.8351383
Subtract 2493 from 3220 to get 727.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7270, and continue the process.

Let's proceed to step 16:
The number 831 fits into 7270 8 times, leaving a remainder of 622.
Put 8 as the next digit of the answer. 
Result so far: 94789.83513838
If we take 6648 away from 7270, we end up with 622.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6220, and continue the process.

In conclusion, the division gives 94789.83513838 with a balance of 6.22e-07.