We're dividing 81423628 by 4 
Let's see how many times 4 fits into 81423628.

Let's proceed to step 1:
If we divide 8 by 4, we get 2 and a remainder of 0.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 8 from 8 leaves us with 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 4

Let's proceed to step 2:
If we divide 1 by 4, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
If we subtract 0 from 1, we get 1.
Include the next digit (4) from the dividend after 1, then repeat: 14 / 4

Moving on to step 3:
4 can be fit into 14 3 times, resulting in a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 203.0
Subtract 12 from 14 to get 2.
Grab the next digit (2) from the dividend, add it to 2, then carry on: 22 / 4

Moving on to step 4:
If we divide 22 by 4, we get 5 and a remainder of 2.
Write down 5 as next digit of the result. 
Result so far: 2035.0
If we take 20 away from 22, we end up with 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 4

On to step 5:
4 can be fit into 23 5 times, resulting in a remainder of 3.
Record the quotient 5 as the next digit in the result. 
Result so far: 20355.0
The remainder is 3 after subtracting 20 from 23.
Include the next digit (6) from the dividend after 3, then repeat: 36 / 4

Step 6:
4 can be fit into 36 9 times, resulting in a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 203559.0
Deduct 36 from 36 and we're left with 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 4

Going ahead to step 7:
The number 4 fits into 2 0 times, leaving a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 2035590.0
If we subtract 0 from 2, we get 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 4

Going ahead to step 8:
4 goes into 28 7 times with a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 20355907.0
The remainder is 0 after subtracting 28 from 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
4 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 20355907.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
When dividing 0 by 4, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 20355907.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 20355907.0 with a remaining 0.0.