We look at the division of 63910415 by 77 
Our goal is to divide 63910415 by 77.

Going ahead to step 1:
77 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 77

Moving on to step 2:
If we divide 63 by 77, we get 0 and a remainder of 63.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 63, we end up with 63.
Bring next digit (9) of the dividend behind the 63 and repeat the process: 639 / 77

Let's proceed to step 3:
77 can be fit into 639 8 times, resulting in a remainder of 23.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 23 after subtracting 616 from 639.
Bring next digit (1) of the dividend behind the 23 and repeat the process: 231 / 77

Going ahead to step 4:
If we divide 231 by 77, we get 3 and a remainder of 0.
The next digit of our result is 3. 
Result so far: 83.0
Subtract 231 from 231 to get 0.
Grab the next digit (0) from the dividend, add it to 0, then carry on: 0 / 77

On to step 5:
77 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 830.0
Subtracting 0 from 0 leaves us with 0.
Take the next digit (4) from the dividend and append it to 0, then repeat: 4 / 77

On to step 6:
When dividing 4 by 77, we get 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 8300.0
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (1) from the dividend, add it to 4, then carry on: 41 / 77

Advancing to step 7:
The number 77 fits into 41 0 times, leaving a remainder of 41.
Put 0 as the next digit of the answer. 
Result so far: 83000.0
Subtracting 0 from 41 leaves us with 41.
Grab the next digit (5) from the dividend, add it to 41, then carry on: 415 / 77

Advancing to step 8:
If we divide 415 by 77, we get 5 and a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 830005.0
If we subtract 385 from 415, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 9:
300 divided by 77 is 3 with a remainder of 69.
Use 3 as the next digit of our solution. 
Result so far: 830005.3
Subtract 231 from 300 to get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Moving on to step 10:
77 goes into 690 8 times with a remainder of 74.
The number 8 becomes the next digit in our result. 
Result so far: 830005.38
The remainder is 74 after subtracting 616 from 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 11:
77 goes into 740 9 times with a remainder of 47.
The number 9 becomes the next digit in our result. 
Result so far: 830005.389
The remainder is 47 after subtracting 693 from 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Step 12:
When dividing 470 by 77, we get 6 with a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 830005.3896
Subtract 462 from 470 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 13:
80 divided by 77 is 1 with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 830005.38961
If we take 77 away from 80, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 14:
When dividing 30 by 77, we get 0 with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 830005.38961
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 15:
The number 77 fits into 300 3 times, leaving a remainder of 69.
Put 3 as the next digit of the answer. 
Result so far: 830005.3896103
Subtracting 231 from 300 leaves us with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

On to step 16:
When dividing 690 by 77, we get 8 with a remainder of 74.
Record the quotient 8 as the next digit in the result. 
Result so far: 830005.38961038
Deduct 616 from 690 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

The final outcome is 830005.38961038, with a leftover of 7.4e-08.