We look at the division of 168686 by 4 
Our goal is to divide 168686 by 4.

Advancing to step 1:
1 divided by 4 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 4

Advancing to step 2:
4 goes into 16 4 times with a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 16 from 16 and we're left with 0.
Grab the next digit (8) from the dividend, add it to 0, then carry on: 8 / 4

On to step 3:
When dividing 8 by 4, we get 2 with a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 42.0
Subtract 8 from 8 to get 0.
Append the next digit (6) from the dividend to 0 and continue with: 6 / 4

Going ahead to step 4:
4 can be fit into 6 1 times, resulting in a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 421.0
Subtract 4 from 6 to get 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 4

Step 5:
4 can be fit into 28 7 times, resulting in a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 4217.0
The remainder is 0 after subtracting 28 from 28.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 4

Step 6:
4 can be fit into 6 1 times, resulting in a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 42171.0
If we take 4 away from 6, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
When dividing 20 by 4, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 42171.5
Deduct 20 from 20 and we're left 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.

Let's proceed to step 8:
4 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 42171.5
Subtracting 0 from 0 leaves us 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.

Advancing to step 9:
If we divide 0 by 4, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 42171.5
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.

The quotient of the division is 42171.5, and the remainder is 0.0.