206870 ÷ 12 
We want to figure out the number of times 206870 can be divided by 12.

Going ahead to step 1:
12 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 12

Advancing to step 2:
If we divide 20 by 12, we get 1 and a remainder of 8.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 12 from 20 to get 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 12

Going ahead to step 3:
The number 12 fits into 86 7 times, leaving a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 17.0
Subtracting 84 from 86 leaves us with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 12

Step 4:
28 divided by 12 is 2 with a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 172.0
If we subtract 24 from 28, we get 4.
Include the next digit (7) from the dividend after 4, then repeat: 47 / 12

Moving on to step 5:
If we divide 47 by 12, we get 3 and a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 1723.0
If we take 36 away from 47, we end up with 11.
Grab the next digit (0) from the dividend, add it to 11, then carry on: 110 / 12

On to step 6:
The number 12 fits into 110 9 times, leaving a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 17239.0
Subtracting 108 from 110 leaves us 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.

On to step 7:
12 goes into 20 1 times with a remainder of 8.
The next digit of our result is 1. 
Result so far: 17239.1
If we take 12 away from 20, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 8:
The number 12 fits into 80 6 times, leaving a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 17239.16
If we subtract 72 from 80, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 9:
When dividing 80 by 12, we get 6 with a remainder of 8.
The next digit of our result is 6. 
Result so far: 17239.166
The remainder is 8 after subtracting 72 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 17239.166, with a leftover of 0.0008.