376438 divided by 21 
Let's see how many times 21 fits into 376438.

Advancing to step 1:
21 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Grab the next digit (7) from the dividend, add it to 3, then carry on: 37 / 21

On to step 2:
The number 21 fits into 37 1 times, leaving a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 21 from 37, we get 16.
Grab the next digit (6) from the dividend, add it to 16, then carry on: 166 / 21

Going ahead to step 3:
166 divided by 21 is 7 with a remainder of 19.
The next digit of our result is 7. 
Result so far: 17.0
Deduct 147 from 166 and we're left with 19.
Include the next digit (4) from the dividend after 19, then repeat: 194 / 21

Step 4:
21 goes into 194 9 times with a remainder of 5.
Write down 9 as next digit of the result. 
Result so far: 179.0
If we take 189 away from 194, we end up with 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 21

Going ahead to step 5:
21 goes into 53 2 times with a remainder of 11.
Use 2 as the next digit of our solution. 
Result so far: 1792.0
Subtracting 42 from 53 leaves us with 11.
Bring next digit (8) of the dividend behind the 11 and repeat the process: 118 / 21

Advancing to step 6:
21 can be fit into 118 5 times, resulting in a remainder of 13.
Put 5 as the next digit of the answer. 
Result so far: 17925.0
If we subtract 105 from 118, 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:
130 divided by 21 is 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 17925.6
If we take 126 away from 130, we end up 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.

Step 8:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 17925.61
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 9:
If we divide 190 by 21, we get 9 and a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 17925.619
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.

Going ahead to step 10:
10 divided by 21 is 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 17925.619
Deduct 0 from 10 and we're left 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.

Advancing to step 11:
If we divide 100 by 21, we get 4 and a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 17925.61904
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.

Moving on to step 12:
When dividing 160 by 21, we get 7 with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 17925.619047
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.

Moving on to step 13:
21 can be fit into 130 6 times, resulting in a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 17925.6190476
Deduct 126 from 130 and we're left 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 14:
40 divided by 21 is 1 with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 17925.61904761
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.

In conclusion, the division gives 17925.61904761 with a balance of 1.9e-08.