687278 divided by 21 
We want to figure out the number of times 687278 can be divided by 21.

Going ahead to step 1:
6 divided by 21 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 21

Advancing to step 2:
21 goes into 68 3 times with a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 63 away from 68, we end up with 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 21

Let's proceed to step 3:
When dividing 57 by 21, we get 2 with a remainder of 15.
Put 2 as the next digit of the answer. 
Result so far: 32.0
If we subtract 42 from 57, we get 15.
Bring next digit (2) of the dividend behind the 15 and repeat the process: 152 / 21

Going ahead to step 4:
152 divided by 21 is 7 with a remainder of 5.
The number 7 becomes the next digit in our result. 
Result so far: 327.0
If we take 147 away from 152, we end up with 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 21

Let's proceed to step 5:
21 goes into 57 2 times with a remainder of 15.
The next digit of our result is 2. 
Result so far: 3272.0
Subtracting 42 from 57 leaves us with 15.
Include the next digit (8) from the dividend after 15, then repeat: 158 / 21

Advancing to step 6:
158 divided by 21 is 7 with a remainder of 11.
The next digit of our result is 7. 
Result so far: 32727.0
Subtract 147 from 158 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.

Step 7:
21 goes into 110 5 times with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 32727.5
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.

Going ahead to step 8:
21 can be fit into 50 2 times, resulting in a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 32727.52
Deduct 42 from 50 and we're left 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.

On to step 9:
80 divided by 21 is 3 with a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 32727.523
Deduct 63 from 80 and we're left 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.

Moving on to step 10:
When dividing 170 by 21, we get 8 with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 32727.5238
If we subtract 168 from 170, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 11:
21 goes into 20 0 times with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 32727.5238
Deduct 0 from 20 and we're left 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.

Advancing to step 12:
21 can be fit into 200 9 times, resulting in a remainder of 11.
The next digit of our result is 9. 
Result so far: 32727.523809
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.

Moving on to step 13:
If we divide 110 by 21, we get 5 and a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 32727.5238095
Deduct 105 from 110 and we're left 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.

Step 14:
When dividing 50 by 21, we get 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 32727.52380952
If we subtract 42 from 50, we 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.

Our division results in 32727.52380952 with a remaining 8e-09.