We look at the division of 341788 by 21 
We want to figure out the number of times 341788 can be divided by 21.

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
The remainder is 3 after subtracting 0 from 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 21

Advancing to step 2:
When dividing 34 by 21, we get 1 with a remainder of 13.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 21 from 34 and we're left with 13.
Grab the next digit (1) from the dividend, add it to 13, then carry on: 131 / 21

Let's proceed to step 3:
If we divide 131 by 21, we get 6 and a remainder of 5.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
The remainder is 5 after subtracting 126 from 131.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 21

Let's proceed to step 4:
If we divide 57 by 21, we get 2 and a remainder of 15.
Put 2 as the next digit of the answer. 
Result so far: 162.0
The remainder is 15 after subtracting 42 from 57.
Fetch the next digit (8) from the dividend, attach it to 15 and continue: 158 / 21

Moving on to step 5:
21 can be fit into 158 7 times, resulting in a remainder of 11.
The next digit of our result is 7. 
Result so far: 1627.0
If we subtract 147 from 158, we get 11.
Include the next digit (8) from the dividend after 11, then repeat: 118 / 21

Step 6:
21 can be fit into 118 5 times, resulting in a remainder of 13.
Write down 5 as next digit of the result. 
Result so far: 16275.0
The remainder is 13 after subtracting 105 from 118.
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 7:
21 goes into 130 6 times with a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 16275.6
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.

Let's proceed to step 8:
If we divide 40 by 21, we get 1 and a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 16275.61
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.

Going ahead to step 9:
21 goes into 190 9 times with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 16275.619
Subtracting 189 from 190 leaves us with 1.
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:
21 can be fit into 10 0 times, resulting in a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 16275.619
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.

Going ahead 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: 16275.61904
The remainder is 16 after subtracting 84 from 100.
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 12:
160 divided by 21 is 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 16275.619047
The remainder is 13 after subtracting 147 from 160.
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 13:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 16275.6190476
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.

Step 14:
If we divide 40 by 21, we get 1 and a remainder of 19.
The next digit of our result is 1. 
Result so far: 16275.61904761
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.

Our division results in 16275.61904761 with a remaining 1.9e-08.