685786 ÷ 51 
We're looking to find how many times 51 goes into 685786.

Step 1:
6 divided by 51 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 51

Advancing to step 2:
When dividing 68 by 51, we get 1 with a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 17 after subtracting 51 from 68.
Include the next digit (5) from the dividend after 17, then repeat: 175 / 51

Advancing to step 3:
When dividing 175 by 51, we get 3 with a remainder of 22.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Subtract 153 from 175 to get 22.
Fetch the next digit (7) from the dividend, attach it to 22 and continue: 227 / 51

Advancing to step 4:
51 goes into 227 4 times with a remainder of 23.
Put 4 as the next digit of the answer. 
Result so far: 134.0
The remainder is 23 after subtracting 204 from 227.
Append the next digit (8) from the dividend to 23 and continue with: 238 / 51

Let's proceed to step 5:
The number 51 fits into 238 4 times, leaving a remainder of 34.
Use 4 as the next digit of our solution. 
Result so far: 1344.0
Subtract 204 from 238 to get 34.
Take the next digit (6) from the dividend and append it to 34, then repeat: 346 / 51

Moving on to step 6:
The number 51 fits into 346 6 times, leaving a remainder of 40.
The number 6 becomes the next digit in our result. 
Result so far: 13446.0
Subtract 306 from 346 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 7:
51 goes into 400 7 times with a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 13446.7
If we subtract 357 from 400, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 8:
430 divided by 51 is 8 with a remainder of 22.
Put 8 as the next digit of the answer. 
Result so far: 13446.78
Subtract 408 from 430 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 9:
If we divide 220 by 51, we get 4 and a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 13446.784
Subtracting 204 from 220 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 10:
If we divide 160 by 51, we get 3 and a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 13446.7843
If we take 153 away from 160, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 11:
51 goes into 70 1 times with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 13446.78431
If we subtract 51 from 70, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 12:
The number 51 fits into 190 3 times, leaving a remainder of 37.
The number 3 becomes the next digit in our result. 
Result so far: 13446.784313
Deduct 153 from 190 and we're left with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 13:
When dividing 370 by 51, we get 7 with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 13446.7843137
Subtract 357 from 370 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 14:
If we divide 130 by 51, we get 2 and a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 13446.78431372
The remainder is 28 after subtracting 102 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

After the division, we end up with 13446.78431372 and a remainder of 2.8e-08.