63813719 ÷ 809 
We're looking to find how many times 809 goes into 63813719.

Advancing to step 1:
809 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 809

On to step 2:
The number 809 fits into 63 0 times, leaving a remainder of 63.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 63 leaves us with 63.
Grab the next digit (8) from the dividend, add it to 63, then carry on: 638 / 809

Advancing to step 3:
809 can be fit into 638 0 times, resulting in a remainder of 638.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 638, we end up with 638.
Grab the next digit (1) from the dividend, add it to 638, then carry on: 6381 / 809

On to step 4:
The number 809 fits into 6381 7 times, leaving a remainder of 718.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Deduct 5663 from 6381 and we're left with 718.
Bring next digit (3) of the dividend behind the 718 and repeat the process: 7183 / 809

Step 5:
809 can be fit into 7183 8 times, resulting in a remainder of 711.
Record the quotient 8 as the next digit in the result. 
Result so far: 78.0
Subtract 6472 from 7183 to get 711.
Fetch the next digit (7) from the dividend, attach it to 711 and continue: 7117 / 809

On to step 6:
When dividing 7117 by 809, we get 8 with a remainder of 645.
Record the quotient 8 as the next digit in the result. 
Result so far: 788.0
Deduct 6472 from 7117 and we're left with 645.
Include the next digit (1) from the dividend after 645, then repeat: 6451 / 809

Going ahead to step 7:
809 goes into 6451 7 times with a remainder of 788.
Write down 7 as next digit of the result. 
Result so far: 7887.0
Subtracting 5663 from 6451 leaves us with 788.
Bring next digit (9) of the dividend behind the 788 and repeat the process: 7889 / 809

Going ahead to step 8:
809 goes into 7889 9 times with a remainder of 608.
Write down 9 as next digit of the result. 
Result so far: 78879.0
If we take 7281 away from 7889, we end up with 608.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6080, and continue the process.

Advancing to step 9:
When dividing 6080 by 809, we get 7 with a remainder of 417.
Put 7 as the next digit of the answer. 
Result so far: 78879.7
If we take 5663 away from 6080, we end up with 417.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4170, and continue the process.

Step 10:
809 can be fit into 4170 5 times, resulting in a remainder of 125.
Use 5 as the next digit of our solution. 
Result so far: 78879.75
If we subtract 4045 from 4170, we get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Let's proceed to step 11:
809 can be fit into 1250 1 times, resulting in a remainder of 441.
The next digit of our result is 1. 
Result so far: 78879.751
Subtract 809 from 1250 to get 441.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4410, and continue the process.

Moving on to step 12:
4410 divided by 809 is 5 with a remainder of 365.
Write down 5 as next digit of the result. 
Result so far: 78879.7515
Subtracting 4045 from 4410 leaves us with 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Going ahead to step 13:
When dividing 3650 by 809, we get 4 with a remainder of 414.
Record the quotient 4 as the next digit in the result. 
Result so far: 78879.75154
If we take 3236 away from 3650, we end up with 414.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4140, and continue the process.

Step 14:
809 can be fit into 4140 5 times, resulting in a remainder of 95.
The number 5 becomes the next digit in our result. 
Result so far: 78879.751545
If we subtract 4045 from 4140, we get 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Going ahead to step 15:
950 divided by 809 is 1 with a remainder of 141.
The number 1 becomes the next digit in our result. 
Result so far: 78879.7515451
If we take 809 away from 950, we end up with 141.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

On to step 16:
809 goes into 1410 1 times with a remainder of 601.
The number 1 becomes the next digit in our result. 
Result so far: 78879.75154511
The remainder is 601 after subtracting 809 from 1410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6010, and continue the process.

The final outcome is 78879.75154511, with a leftover of 6.01e-07.