We're dividing 360671 by 21 
Our goal is to divide 360671 by 21.

Step 1:
3 divided by 21 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 21

Step 2:
21 goes into 36 1 times with a remainder of 15.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 21 from 36 and we're left with 15.
Grab the next digit (0) from the dividend, add it to 15, then carry on: 150 / 21

Going ahead to step 3:
When dividing 150 by 21, we get 7 with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 17.0
Subtracting 147 from 150 leaves us with 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 21

Going ahead to step 4:
21 goes into 36 1 times with a remainder of 15.
Record the quotient 1 as the next digit in the result. 
Result so far: 171.0
Subtracting 21 from 36 leaves us with 15.
Fetch the next digit (7) from the dividend, attach it to 15 and continue: 157 / 21

Going ahead to step 5:
21 can be fit into 157 7 times, resulting in a remainder of 10.
Record the quotient 7 as the next digit in the result. 
Result so far: 1717.0
If we take 147 away from 157, we end up with 10.
Grab the next digit (1) from the dividend, add it to 10, then carry on: 101 / 21

Step 6:
101 divided by 21 is 4 with a remainder of 17.
Put 4 as the next digit of the answer. 
Result so far: 17174.0
If we take 84 away from 101, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 7:
170 divided by 21 is 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 17174.8
Subtracting 168 from 170 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 8:
21 goes into 20 0 times with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 17174.8
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 9:
If we divide 200 by 21, we get 9 and a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 17174.809
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 10:
21 goes into 110 5 times with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 17174.8095
Deduct 105 from 110 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 11:
If we divide 50 by 21, we get 2 and a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 17174.80952
If we take 42 away from 50, 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.

Going ahead to step 12:
21 goes into 80 3 times with a remainder of 17.
The next digit of our result is 3. 
Result so far: 17174.809523
If we take 63 away from 80, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 13:
170 divided by 21 is 8 with a remainder of 2.
The next digit of our result is 8. 
Result so far: 17174.8095238
Subtracting 168 from 170 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.

Let's proceed to step 14:
21 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 17174.8095238
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 17174.8095238 with a remainder of 2e-08.