Let's divide 878414 by 21
Let's see how many times 21 fits into 878414.

Step 1:
21 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (7) from the dividend, add it to 8, then carry on: 87 / 21

Moving on to step 2:
If we divide 87 by 21, we get 4 and a remainder of 3.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 84 from 87 and we're left with 3.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 21

On to step 3:
21 goes into 38 1 times with a remainder of 17.
Record the quotient 1 as the next digit in the result. 
Result so far: 41.0
Subtract 21 from 38 to get 17.
Grab the next digit (4) from the dividend, add it to 17, then carry on: 174 / 21

Advancing to step 4:
174 divided by 21 is 8 with a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 418.0
Subtracting 168 from 174 leaves us with 6.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 21

Going ahead to step 5:
The number 21 fits into 61 2 times, leaving a remainder of 19.
Record the quotient 2 as the next digit in the result. 
Result so far: 4182.0
If we take 42 away from 61, we end up with 19.
Bring next digit (4) of the dividend behind the 19 and repeat the process: 194 / 21

Let's proceed to step 6:
The number 21 fits into 194 9 times, leaving a remainder of 5.
The number 9 becomes the next digit in our result. 
Result so far: 41829.0
If we take 189 away from 194, 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.

Let's proceed to step 7:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 41829.2
Subtract 42 from 50 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 8:
21 goes into 80 3 times with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 41829.23
Subtract 63 from 80 to 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.

Step 9:
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: 41829.238
Deduct 168 from 170 and we're left 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.

Going ahead to step 10:
20 divided by 21 is 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 41829.238
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 11:
The number 21 fits into 200 9 times, leaving a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 41829.23809
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.

Advancing to step 12:
When dividing 110 by 21, we get 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 41829.238095
Subtracting 105 from 110 leaves us 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.

Moving on to step 13:
If we divide 50 by 21, we get 2 and a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 41829.2380952
Subtract 42 from 50 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 14:
The number 21 fits into 80 3 times, leaving a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 41829.23809523
Subtracting 63 from 80 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Our division results in 41829.23809523 with a remaining 1.7e-08.