81393813 divided by 778 
We want to figure out the number of times 81393813 can be divided by 778.

On to step 1:
8 divided by 778 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 778

On to step 2:
778 can be fit into 81 0 times, resulting in a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Append the next digit (3) from the dividend to 81 and continue with: 813 / 778

Going ahead to step 3:
The number 778 fits into 813 1 times, leaving a remainder of 35.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 35 after subtracting 778 from 813.
Grab the next digit (9) from the dividend, add it to 35, then carry on: 359 / 778

Advancing to step 4:
778 goes into 359 0 times with a remainder of 359.
Write down 0 as next digit of the result. 
Result so far: 10.0
Subtract 0 from 359 to get 359.
Include the next digit (3) from the dividend after 359, then repeat: 3593 / 778

Advancing to step 5:
The number 778 fits into 3593 4 times, leaving a remainder of 481.
Record the quotient 4 as the next digit in the result. 
Result so far: 104.0
Subtracting 3112 from 3593 leaves us with 481.
Fetch the next digit (8) from the dividend, attach it to 481 and continue: 4818 / 778

Going ahead to step 6:
778 goes into 4818 6 times with a remainder of 150.
The number 6 becomes the next digit in our result. 
Result so far: 1046.0
If we subtract 4668 from 4818, we get 150.
Include the next digit (1) from the dividend after 150, then repeat: 1501 / 778

Step 7:
778 can be fit into 1501 1 times, resulting in a remainder of 723.
Record the quotient 1 as the next digit in the result. 
Result so far: 10461.0
The remainder is 723 after subtracting 778 from 1501.
Append the next digit (3) from the dividend to 723 and continue with: 7233 / 778

Going ahead to step 8:
The number 778 fits into 7233 9 times, leaving a remainder of 231.
Use 9 as the next digit of our solution. 
Result so far: 104619.0
Deduct 7002 from 7233 and we're left with 231.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

Step 9:
778 goes into 2310 2 times with a remainder of 754.
Put 2 as the next digit of the answer. 
Result so far: 104619.2
Deduct 1556 from 2310 and we're left with 754.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7540, and continue the process.

Moving on to step 10:
778 can be fit into 7540 9 times, resulting in a remainder of 538.
Put 9 as the next digit of the answer. 
Result so far: 104619.29
The remainder is 538 after subtracting 7002 from 7540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5380, and continue the process.

Let's proceed to step 11:
When dividing 5380 by 778, we get 6 with a remainder of 712.
Write down 6 as next digit of the result. 
Result so far: 104619.296
Subtract 4668 from 5380 to get 712.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7120, and continue the process.

On to step 12:
When dividing 7120 by 778, we get 9 with a remainder of 118.
Put 9 as the next digit of the answer. 
Result so far: 104619.2969
Subtract 7002 from 7120 to get 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Advancing to step 13:
If we divide 1180 by 778, we get 1 and a remainder of 402.
The next digit of our result is 1. 
Result so far: 104619.29691
The remainder is 402 after subtracting 778 from 1180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

Advancing to step 14:
The number 778 fits into 4020 5 times, leaving a remainder of 130.
Write down 5 as next digit of the result. 
Result so far: 104619.296915
If we subtract 3890 from 4020, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Step 15:
If we divide 1300 by 778, we get 1 and a remainder of 522.
The number 1 becomes the next digit in our result. 
Result so far: 104619.2969151
If we take 778 away from 1300, we end up with 522.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5220, and continue the process.

Advancing to step 16:
778 goes into 5220 6 times with a remainder of 552.
Put 6 as the next digit of the answer. 
Result so far: 104619.29691516
Subtracting 4668 from 5220 leaves us with 552.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

The final result is 104619.29691516 with a remainder of 5.52e-07.