888638 divided by 4 
We want to figure out the number of times 888638 can be divided by 4.

Step 1:
When dividing 8 by 4, we get 2 with a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 8 away from 8, we end up with 0.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 4

On to step 2:
The number 4 fits into 8 2 times, leaving a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 22.0
Subtracting 8 from 8 leaves us with 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 4

Let's proceed to step 3:
8 divided by 4 is 2 with a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 222.0
If we subtract 8 from 8, we get 0.
Include the next digit (6) from the dividend after 0, then repeat: 6 / 4

Advancing to step 4:
The number 4 fits into 6 1 times, leaving a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 2221.0
Subtracting 4 from 6 leaves us with 2.
Take the next digit (3) from the dividend and append it to 2, then repeat: 23 / 4

Moving on to step 5:
When dividing 23 by 4, we get 5 with a remainder of 3.
Record the quotient 5 as the next digit in the result. 
Result so far: 22215.0
Subtract 20 from 23 to get 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 4

Moving on to step 6:
38 divided by 4 is 9 with a remainder of 2.
The next digit of our result is 9. 
Result so far: 222159.0
If we subtract 36 from 38, 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.

Let's proceed to step 7:
The number 4 fits into 20 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 222159.5
If we subtract 20 from 20, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
4 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 222159.5
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
The number 4 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 222159.5
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.

After the division, we end up with 222159.5 and a remainder of 0.0.