Let's divide 678551 by 21
We want to figure out the number of times 678551 can be divided by 21.

Moving on to step 1:
21 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 21

Going ahead to step 2:
When dividing 67 by 21, we get 3 with a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 4 after subtracting 63 from 67.
Append the next digit (8) from the dividend to 4 and continue with: 48 / 21

Moving on to step 3:
When dividing 48 by 21, we get 2 with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 32.0
Subtract 42 from 48 to get 6.
Bring next digit (5) of the dividend behind the 6 and repeat the process: 65 / 21

Advancing to step 4:
If we divide 65 by 21, we get 3 and a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 323.0
Deduct 63 from 65 and we're left with 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 21

Going ahead to step 5:
21 can be fit into 25 1 times, resulting in a remainder of 4.
The next digit of our result is 1. 
Result so far: 3231.0
Subtract 21 from 25 to get 4.
Include the next digit (1) from the dividend after 4, then repeat: 41 / 21

Let's proceed to step 6:
21 goes into 41 1 times with a remainder of 20.
Put 1 as the next digit of the answer. 
Result so far: 32311.0
Subtract 21 from 41 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 7:
The number 21 fits into 200 9 times, leaving a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 32311.9
Deduct 189 from 200 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 8:
When dividing 110 by 21, we get 5 with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 32311.95
If we subtract 105 from 110, we get 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 9:
21 goes into 50 2 times with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 32311.952
Subtracting 42 from 50 leaves us 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.

Moving on to step 10:
If we divide 80 by 21, we get 3 and a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 32311.9523
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.

Going ahead to step 11:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 32311.95238
Subtracting 168 from 170 leaves us 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.

Let's proceed to step 12:
21 goes into 20 0 times with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 32311.95238
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 13:
When dividing 200 by 21, we get 9 with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 32311.9523809
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.

On to step 14:
110 divided by 21 is 5 with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 32311.95238095
Subtract 105 from 110 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

After the division, we end up with 32311.95238095 and a remainder of 5e-09.