We look at the division of 51513601 by 809 
We want to figure out the number of times 51513601 can be divided by 809.

On to step 1:
5 divided by 809 is 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 809

On to step 2:
When dividing 51 by 809, we get 0 with a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 51 and we're left with 51.
Include the next digit (5) from the dividend after 51, then repeat: 515 / 809

Step 3:
515 divided by 809 is 0 with a remainder of 515.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 515 after subtracting 0 from 515.
Take the next digit (1) from the dividend and append it to 515, then repeat: 5151 / 809

On to step 4:
809 can be fit into 5151 6 times, resulting in a remainder of 297.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtracting 4854 from 5151 leaves us with 297.
Bring next digit (3) of the dividend behind the 297 and repeat the process: 2973 / 809

Going ahead to step 5:
The number 809 fits into 2973 3 times, leaving a remainder of 546.
The number 3 becomes the next digit in our result. 
Result so far: 63.0
Subtract 2427 from 2973 to get 546.
Take the next digit (6) from the dividend and append it to 546, then repeat: 5466 / 809

Going ahead to step 6:
The number 809 fits into 5466 6 times, leaving a remainder of 612.
The next digit of our result is 6. 
Result so far: 636.0
Subtracting 4854 from 5466 leaves us with 612.
Fetch the next digit (0) from the dividend, attach it to 612 and continue: 6120 / 809

Advancing to step 7:
809 can be fit into 6120 7 times, resulting in a remainder of 457.
Write down 7 as next digit of the result. 
Result so far: 6367.0
If we take 5663 away from 6120, we end up with 457.
Append the next digit (1) from the dividend to 457 and continue with: 4571 / 809

Advancing to step 8:
When dividing 4571 by 809, we get 5 with a remainder of 526.
The number 5 becomes the next digit in our result. 
Result so far: 63675.0
Subtracting 4045 from 4571 leaves us with 526.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5260, and continue the process.

Let's proceed to step 9:
If we divide 5260 by 809, we get 6 and a remainder of 406.
Use 6 as the next digit of our solution. 
Result so far: 63675.6
The remainder is 406 after subtracting 4854 from 5260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4060, and continue the process.

Moving on to step 10:
When dividing 4060 by 809, we get 5 with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 63675.65
Subtracting 4045 from 4060 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 11:
809 goes into 150 0 times with a remainder of 150.
Use 0 as the next digit of our solution. 
Result so far: 63675.65
Deduct 0 from 150 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 12:
809 goes into 1500 1 times with a remainder of 691.
Write down 1 as next digit of the result. 
Result so far: 63675.6501
If we subtract 809 from 1500, we get 691.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6910, and continue the process.

Moving on to step 13:
6910 divided by 809 is 8 with a remainder of 438.
Use 8 as the next digit of our solution. 
Result so far: 63675.65018
Subtract 6472 from 6910 to get 438.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4380, and continue the process.

Going ahead to step 14:
When dividing 4380 by 809, we get 5 with a remainder of 335.
Record the quotient 5 as the next digit in the result. 
Result so far: 63675.650185
Subtract 4045 from 4380 to get 335.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

Let's proceed to step 15:
3350 divided by 809 is 4 with a remainder of 114.
The next digit of our result is 4. 
Result so far: 63675.6501854
If we take 3236 away from 3350, we end up with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

On to step 16:
809 goes into 1140 1 times with a remainder of 331.
Record the quotient 1 as the next digit in the result. 
Result so far: 63675.65018541
If we take 809 away from 1140, we end up with 331.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

The final outcome is 63675.65018541, with a leftover of 3.31e-07.