We divide 348396 by 21
Let's see how many times 21 fits into 348396.

Step 1:
21 can be fit into 3 0 times, resulting in a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 21

Let's proceed to step 2:
34 divided by 21 is 1 with a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 21 from 34 to get 13.
Append the next digit (8) from the dividend to 13 and continue with: 138 / 21

Going ahead to step 3:
21 goes into 138 6 times with a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 16.0
If we take 126 away from 138, we end up with 12.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 21

Moving on to step 4:
21 goes into 123 5 times with a remainder of 18.
Record the quotient 5 as the next digit in the result. 
Result so far: 165.0
If we subtract 105 from 123, we get 18.
Take the next digit (9) from the dividend and append it to 18, then repeat: 189 / 21

Step 5:
The number 21 fits into 189 9 times, leaving a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 1659.0
Subtracting 189 from 189 leaves us with 0.
Include the next digit (6) from the dividend after 0, then repeat: 6 / 21

Going ahead to step 6:
When dividing 6 by 21, we get 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 16590.0
The remainder is 6 after subtracting 0 from 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 7:
21 can be fit into 60 2 times, resulting in a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 16590.2
If we take 42 away from 60, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 8:
The number 21 fits into 180 8 times, leaving a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 16590.28
If we subtract 168 from 180, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 9:
If we divide 120 by 21, we get 5 and a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 16590.285
Subtracting 105 from 120 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 10:
The number 21 fits into 150 7 times, leaving a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 16590.2857
Deduct 147 from 150 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 11:
The number 21 fits into 30 1 times, leaving a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 16590.28571
If we subtract 21 from 30, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 12:
The number 21 fits into 90 4 times, leaving a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 16590.285714
Subtract 84 from 90 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 13:
The number 21 fits into 60 2 times, leaving a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 16590.2857142
Subtract 42 from 60 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 14:
180 divided by 21 is 8 with a remainder of 12.
The next digit of our result is 8. 
Result so far: 16590.28571428
Subtract 168 from 180 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The quotient of the division is 16590.28571428, and the remainder is 1.2e-08.