We divide 168520 by 12
We're looking to find how many times 12 goes into 168520.

Step 1:
12 goes into 1 0 times with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 12

Moving on to step 2:
The number 12 fits into 16 1 times, leaving a remainder of 4.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 12 from 16 and we're left with 4.
Append the next digit (8) from the dividend to 4 and continue with: 48 / 12

On to step 3:
When dividing 48 by 12, we get 4 with a remainder of 0.
The next digit of our result is 4. 
Result so far: 14.0
If we subtract 48 from 48, we get 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 12

Step 4:
12 can be fit into 5 0 times, resulting in a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 140.0
Subtracting 0 from 5 leaves us with 5.
Append the next digit (2) from the dividend to 5 and continue with: 52 / 12

Moving on to step 5:
12 goes into 52 4 times with a remainder of 4.
Write down 4 as next digit of the result. 
Result so far: 1404.0
If we take 48 away from 52, we end up with 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 12

Going ahead to step 6:
12 goes into 40 3 times with a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 14043.0
Subtracting 36 from 40 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 7:
When dividing 40 by 12, we get 3 with a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 14043.3
Deduct 36 from 40 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 8:
When dividing 40 by 12, we get 3 with a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 14043.33
Subtracting 36 from 40 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 14043.33, with a leftover of 0.004.