We divide 361618 by 21
We're looking to find how many times 21 goes into 361618.

Advancing to step 1:
The number 21 fits into 3 0 times, leaving 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.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 21

Advancing to step 2:
If we divide 36 by 21, we get 1 and a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 21 from 36 and we're left with 15.
Take the next digit (1) from the dividend and append it to 15, then repeat: 151 / 21

Going ahead to step 3:
The number 21 fits into 151 7 times, leaving a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
If we subtract 147 from 151, we get 4.
Fetch the next digit (6) from the dividend, attach it to 4 and continue: 46 / 21

On to step 4:
The number 21 fits into 46 2 times, leaving a remainder of 4.
The next digit of our result is 2. 
Result so far: 172.0
Deduct 42 from 46 and we're left with 4.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 21

On to step 5:
21 can be fit into 41 1 times, resulting in a remainder of 20.
The next digit of our result is 1. 
Result so far: 1721.0
Deduct 21 from 41 and we're left with 20.
Bring next digit (8) of the dividend behind the 20 and repeat the process: 208 / 21

Step 6:
21 can be fit into 208 9 times, resulting in a remainder of 19.
The next digit of our result is 9. 
Result so far: 17219.0
The remainder is 19 after subtracting 189 from 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 7:
If we divide 190 by 21, we get 9 and a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 17219.9
Subtract 189 from 190 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 8:
The number 21 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 17219.9
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 9:
If we divide 100 by 21, we get 4 and a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 17219.904
Deduct 84 from 100 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 10:
21 goes into 160 7 times with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 17219.9047
Subtract 147 from 160 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 11:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 17219.90476
Subtracting 126 from 130 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.

Moving on to step 12:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 17219.904761
Subtracting 21 from 40 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 13:
21 can be fit into 190 9 times, resulting in a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 17219.9047619
The remainder is 1 after subtracting 189 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 14:
When dividing 10 by 21, we get 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 17219.9047619
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 17219.9047619 and a remainder of 1e-08.