372308 ÷ 21 
We want to figure out the number of times 372308 can be divided by 21.

Moving on to step 1:
3 divided by 21 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 21

Step 2:
37 divided by 21 is 1 with a remainder of 16.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 21 from 37 and we're left with 16.
Grab the next digit (2) from the dividend, add it to 16, then carry on: 162 / 21

Going ahead to step 3:
If we divide 162 by 21, we get 7 and a remainder of 15.
The next digit of our result is 7. 
Result so far: 17.0
If we take 147 away from 162, we end up with 15.
Fetch the next digit (3) from the dividend, attach it to 15 and continue: 153 / 21

Moving on to step 4:
21 can be fit into 153 7 times, resulting in a remainder of 6.
The next digit of our result is 7. 
Result so far: 177.0
The remainder is 6 after subtracting 147 from 153.
Include the next digit (0) from the dividend after 6, then repeat: 60 / 21

Going ahead to step 5:
When dividing 60 by 21, we get 2 with a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 1772.0
Deduct 42 from 60 and we're left with 18.
Bring next digit (8) of the dividend behind the 18 and repeat the process: 188 / 21

Let's proceed to step 6:
When dividing 188 by 21, we get 8 with a remainder of 20.
The number 8 becomes the next digit in our result. 
Result so far: 17728.0
The remainder is 20 after subtracting 168 from 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 7:
The number 21 fits into 200 9 times, leaving a remainder of 11.
The next digit of our result is 9. 
Result so far: 17728.9
If we subtract 189 from 200, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 8:
21 can be fit into 110 5 times, resulting in a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 17728.95
If we take 105 away from 110, we end up 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.

Going ahead to step 9:
The number 21 fits into 50 2 times, leaving a remainder of 8.
The next digit of our result is 2. 
Result so far: 17728.952
Subtracting 42 from 50 leaves us 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.

Advancing to step 10:
21 goes into 80 3 times with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 17728.9523
If we subtract 63 from 80, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 11:
When dividing 170 by 21, we get 8 with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 17728.95238
If we take 168 away from 170, we end up 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.

Moving on to step 12:
When dividing 20 by 21, we get 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 17728.95238
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 13:
21 can be fit into 200 9 times, resulting in a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 17728.9523809
Subtract 189 from 200 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 14:
21 goes into 110 5 times with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 17728.95238095
The remainder is 5 after subtracting 105 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The quotient of the division is 17728.95238095, and the remainder is 5e-09.