4460886 ÷ 21 
We want to figure out the number of times 4460886 can be divided by 21.

On to step 1:
If we divide 4 by 21, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Grab the next digit (4) from the dividend, add it to 4, then carry on: 44 / 21

Going ahead to step 2:
When dividing 44 by 21, we get 2 with a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 42 from 44 and we're left with 2.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 21

Going ahead to step 3:
21 goes into 26 1 times with a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 21.0
Subtracting 21 from 26 leaves us with 5.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 21

Moving on to step 4:
21 goes into 50 2 times with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 212.0
If we take 42 away from 50, we end up with 8.
Include the next digit (8) from the dividend after 8, then repeat: 88 / 21

Moving on to step 5:
21 can be fit into 88 4 times, resulting in a remainder of 4.
Record the quotient 4 as the next digit in the result. 
Result so far: 2124.0
If we subtract 84 from 88, we get 4.
Append the next digit (8) from the dividend to 4 and continue with: 48 / 21

Let's proceed to step 6:
48 divided by 21 is 2 with a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 21242.0
The remainder is 6 after subtracting 42 from 48.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 21

Step 7:
The number 21 fits into 66 3 times, leaving a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 212423.0
If we subtract 63 from 66, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 8:
If we divide 30 by 21, we get 1 and a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 212423.1
Subtract 21 from 30 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 9:
If we divide 90 by 21, we get 4 and a remainder of 6.
The next digit of our result is 4. 
Result so far: 212423.14
If we subtract 84 from 90, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 10:
The number 21 fits into 60 2 times, leaving a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 212423.142
Subtract 42 from 60 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 11:
21 can be fit into 180 8 times, resulting in a remainder of 12.
The next digit of our result is 8. 
Result so far: 212423.1428
If we take 168 away from 180, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 12:
21 can be fit into 120 5 times, resulting in a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 212423.14285
The remainder is 15 after subtracting 105 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 13:
The number 21 fits into 150 7 times, leaving a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 212423.142857
If we subtract 147 from 150, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 14:
If we divide 30 by 21, we get 1 and a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 212423.1428571
If we take 21 away from 30, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 15:
21 can be fit into 90 4 times, resulting in a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 212423.14285714
Subtracting 84 from 90 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The quotient of the division is 212423.14285714, and the remainder is 6e-09.