We're dividing 374380 by 21 
We're looking to find how many times 21 goes into 374380.

Step 1:
21 goes into 3 0 times with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 21

Let's proceed to step 2:
When dividing 37 by 21, we get 1 with a remainder of 16.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 21 away from 37, we end up with 16.
Take the next digit (4) from the dividend and append it to 16, then repeat: 164 / 21

Advancing to step 3:
21 goes into 164 7 times with a remainder of 17.
The next digit of our result is 7. 
Result so far: 17.0
Subtracting 147 from 164 leaves us with 17.
Append the next digit (3) from the dividend to 17 and continue with: 173 / 21

On to step 4:
21 can be fit into 173 8 times, resulting in a remainder of 5.
Put 8 as the next digit of the answer. 
Result so far: 178.0
Deduct 168 from 173 and we're left with 5.
Fetch the next digit (8) from the dividend, attach it to 5 and continue: 58 / 21

Let's proceed to step 5:
The number 21 fits into 58 2 times, leaving a remainder of 16.
The number 2 becomes the next digit in our result. 
Result so far: 1782.0
If we subtract 42 from 58, we get 16.
Grab the next digit (0) from the dividend, add it to 16, then carry on: 160 / 21

Let's proceed to step 6:
21 can be fit into 160 7 times, resulting in a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 17827.0
If we subtract 147 from 160, we 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.

Step 7:
21 can be fit into 130 6 times, resulting in a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 17827.6
If we subtract 126 from 130, we get 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 8:
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: 17827.61
Deduct 21 from 40 and we're left 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.

On to step 9:
190 divided by 21 is 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 17827.619
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.

Step 10:
21 can be fit into 10 0 times, resulting in a remainder of 10.
The next digit of our result is 0. 
Result so far: 17827.619
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.

Advancing to step 11:
21 goes into 100 4 times with a remainder of 16.
The next digit of our result is 4. 
Result so far: 17827.61904
If we subtract 84 from 100, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 12:
When dividing 160 by 21, we get 7 with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 17827.619047
Deduct 147 from 160 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 13:
21 goes into 130 6 times with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 17827.6190476
The remainder is 4 after subtracting 126 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 14:
When dividing 40 by 21, we get 1 with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 17827.61904761
Deduct 21 from 40 and we're left 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.

In conclusion, the division gives 17827.61904761 with a balance of 1.9e-08.