341166 ÷ 21 
Our goal is to divide 341166 by 21.

Going ahead to step 1:
When dividing 3 by 21, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 21

On to step 2:
The number 21 fits into 34 1 times, leaving a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 21 from 34 and we're left with 13.
Include the next digit (1) from the dividend after 13, then repeat: 131 / 21

On to step 3:
131 divided by 21 is 6 with a remainder of 5.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
Deduct 126 from 131 and we're left with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 21

Going ahead to step 4:
When dividing 51 by 21, we get 2 with a remainder of 9.
Use 2 as the next digit of our solution. 
Result so far: 162.0
Subtracting 42 from 51 leaves us with 9.
Include the next digit (6) from the dividend after 9, then repeat: 96 / 21

Advancing to step 5:
21 can be fit into 96 4 times, resulting in a remainder of 12.
Write down 4 as next digit of the result. 
Result so far: 1624.0
If we take 84 away from 96, we end up with 12.
Append the next digit (6) from the dividend to 12 and continue with: 126 / 21

Let's proceed to step 6:
21 goes into 126 6 times with a remainder of 0.
The next digit of our result is 6. 
Result so far: 16246.0
If we take 126 away from 126, 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.

On to step 7:
If we divide 0 by 21, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 16246.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
0 divided by 21 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 16246.0
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 final result is 16246.0 with a remainder of 0.0.