686939 ÷ 20 
Let's see how many times 20 fits into 686939.

On to step 1:
6 divided by 20 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (8) from the dividend and append it to 6, then repeat: 68 / 20

Step 2:
The number 20 fits into 68 3 times, leaving a remainder of 8.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 60 from 68 leaves us with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 20

On to step 3:
86 divided by 20 is 4 with a remainder of 6.
The next digit of our result is 4. 
Result so far: 34.0
If we subtract 80 from 86, we get 6.
Grab the next digit (9) from the dividend, add it to 6, then carry on: 69 / 20

Advancing to step 4:
When dividing 69 by 20, we get 3 with a remainder of 9.
Use 3 as the next digit of our solution. 
Result so far: 343.0
If we subtract 60 from 69, we get 9.
Bring next digit (3) of the dividend behind the 9 and repeat the process: 93 / 20

Let's proceed to step 5:
93 divided by 20 is 4 with a remainder of 13.
Use 4 as the next digit of our solution. 
Result so far: 3434.0
If we subtract 80 from 93, we get 13.
Append the next digit (9) from the dividend to 13 and continue with: 139 / 20

Step 6:
The number 20 fits into 139 6 times, leaving a remainder of 19.
The next digit of our result is 6. 
Result so far: 34346.0
If we take 120 away from 139, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 7:
If we divide 190 by 20, we get 9 and a remainder of 10.
Write down 9 as next digit of the result. 
Result so far: 34346.9
Deduct 180 from 190 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
20 goes into 100 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 34346.95
Subtract 100 from 100 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 34346.95
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
0 divided by 20 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 34346.95
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 34346.95 and a remainder of 0.0.