We look at the division of 8639893 by 215 
We want to divide 8639893 by 215.

Moving on to step 1:
When dividing 8 by 215, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 215

Going ahead to step 2:
215 goes into 86 0 times with a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 86 leaves us with 86.
Fetch the next digit (3) from the dividend, attach it to 86 and continue: 863 / 215

Let's proceed to step 3:
215 goes into 863 4 times with a remainder of 3.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 860 from 863 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 215

Going ahead to step 4:
215 can be fit into 39 0 times, resulting in a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 40.0
Deduct 0 from 39 and we're left with 39.
Bring next digit (8) of the dividend behind the 39 and repeat the process: 398 / 215

On to step 5:
When dividing 398 by 215, we get 1 with a remainder of 183.
Write down 1 as next digit of the result. 
Result so far: 401.0
If we take 215 away from 398, we end up with 183.
Append the next digit (9) from the dividend to 183 and continue with: 1839 / 215

Moving on to step 6:
1839 divided by 215 is 8 with a remainder of 119.
Use 8 as the next digit of our solution. 
Result so far: 4018.0
If we take 1720 away from 1839, we end up with 119.
Take the next digit (3) from the dividend and append it to 119, then repeat: 1193 / 215

Going ahead to step 7:
215 can be fit into 1193 5 times, resulting in a remainder of 118.
The number 5 becomes the next digit in our result. 
Result so far: 40185.0
Subtract 1075 from 1193 to get 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Step 8:
When dividing 1180 by 215, we get 5 with a remainder of 105.
The next digit of our result is 5. 
Result so far: 40185.5
Subtracting 1075 from 1180 leaves us with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Step 9:
1050 divided by 215 is 4 with a remainder of 190.
The number 4 becomes the next digit in our result. 
Result so far: 40185.54
If we take 860 away from 1050, we end up with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Let's proceed to step 10:
The number 215 fits into 1900 8 times, leaving a remainder of 180.
Use 8 as the next digit of our solution. 
Result so far: 40185.548
If we subtract 1720 from 1900, we get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Going ahead to step 11:
215 can be fit into 1800 8 times, resulting in a remainder of 80.
The next digit of our result is 8. 
Result so far: 40185.5488
If we take 1720 away from 1800, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The quotient of the division is 40185.5488, and the remainder is 0.0008.