We look at the division of 51169351 by 686 
Let's see how many times 686 fits into 51169351.

On to step 1:
The number 686 fits into 5 0 times, leaving a remainder of 5.
The number 0 becomes the next digit in our result. 
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 / 686

Let's proceed to step 2:
When dividing 51 by 686, we get 0 with a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Include the next digit (1) from the dividend after 51, then repeat: 511 / 686

Going ahead to step 3:
If we divide 511 by 686, we get 0 and a remainder of 511.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 511 after subtracting 0 from 511.
Fetch the next digit (6) from the dividend, attach it to 511 and continue: 5116 / 686

Advancing to step 4:
If we divide 5116 by 686, we get 7 and a remainder of 314.
The next digit of our result is 7. 
Result so far: 7.0
The remainder is 314 after subtracting 4802 from 5116.
Include the next digit (9) from the dividend after 314, then repeat: 3149 / 686

Step 5:
3149 divided by 686 is 4 with a remainder of 405.
Record the quotient 4 as the next digit in the result. 
Result so far: 74.0
Subtract 2744 from 3149 to get 405.
Bring next digit (3) of the dividend behind the 405 and repeat the process: 4053 / 686

Let's proceed to step 6:
The number 686 fits into 4053 5 times, leaving a remainder of 623.
Write down 5 as next digit of the result. 
Result so far: 745.0
Subtract 3430 from 4053 to get 623.
Take the next digit (5) from the dividend and append it to 623, then repeat: 6235 / 686

Advancing to step 7:
The number 686 fits into 6235 9 times, leaving a remainder of 61.
The next digit of our result is 9. 
Result so far: 7459.0
Subtract 6174 from 6235 to get 61.
Take the next digit (1) from the dividend and append it to 61, then repeat: 611 / 686

On to step 8:
The number 686 fits into 611 0 times, leaving a remainder of 611.
Put 0 as the next digit of the answer. 
Result so far: 74590.0
If we subtract 0 from 611, we get 611.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6110, and continue the process.

Going ahead to step 9:
If we divide 6110 by 686, we get 8 and a remainder of 622.
Record the quotient 8 as the next digit in the result. 
Result so far: 74590.8
The remainder is 622 after subtracting 5488 from 6110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6220, and continue the process.

On to step 10:
686 can be fit into 6220 9 times, resulting in a remainder of 46.
Use 9 as the next digit of our solution. 
Result so far: 74590.89
The remainder is 46 after subtracting 6174 from 6220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 11:
When dividing 460 by 686, we get 0 with a remainder of 460.
Record the quotient 0 as the next digit in the result. 
Result so far: 74590.89
Subtract 0 from 460 to get 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Going ahead to step 12:
If we divide 4600 by 686, we get 6 and a remainder of 484.
Record the quotient 6 as the next digit in the result. 
Result so far: 74590.8906
If we subtract 4116 from 4600, we get 484.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4840, and continue the process.

Step 13:
When dividing 4840 by 686, we get 7 with a remainder of 38.
The next digit of our result is 7. 
Result so far: 74590.89067
The remainder is 38 after subtracting 4802 from 4840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 14:
686 goes into 380 0 times with a remainder of 380.
The next digit of our result is 0. 
Result so far: 74590.89067
If we take 0 away from 380, we end up with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

On to step 15:
If we divide 3800 by 686, we get 5 and a remainder of 370.
The number 5 becomes the next digit in our result. 
Result so far: 74590.8906705
If we take 3430 away from 3800, we end up with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Step 16:
686 goes into 3700 5 times with a remainder of 270.
Put 5 as the next digit of the answer. 
Result so far: 74590.89067055
Subtracting 3430 from 3700 leaves us with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

In conclusion, the division gives 74590.89067055 with a balance of 2.7e-07.