We look at the division of 86903059 by 10 
We're looking to find how many times 10 goes into 86903059.

Going ahead to step 1:
10 goes into 8 0 times with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 10

Going ahead to step 2:
10 goes into 86 8 times with a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we take 80 away from 86, we end up with 6.
Bring next digit (9) of the dividend behind the 6 and repeat the process: 69 / 10

Going ahead to step 3:
When dividing 69 by 10, we get 6 with a remainder of 9.
Write down 6 as next digit of the result. 
Result so far: 86.0
Subtract 60 from 69 to get 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 10

Step 4:
The number 10 fits into 90 9 times, leaving a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 869.0
Subtracting 90 from 90 leaves us with 0.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 10

Step 5:
When dividing 3 by 10, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 8690.0
If we subtract 0 from 3, we get 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 10

Moving on to step 6:
30 divided by 10 is 3 with a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 86903.0
Deduct 30 from 30 and we're left with 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 10

Moving on to step 7:
When dividing 5 by 10, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 869030.0
If we take 0 away from 5, we end up with 5.
Bring next digit (9) of the dividend behind the 5 and repeat the process: 59 / 10

On to step 8:
The number 10 fits into 59 5 times, leaving a remainder of 9.
Put 5 as the next digit of the answer. 
Result so far: 8690305.0
Deduct 50 from 59 and we're left 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.

Let's proceed to step 9:
When dividing 90 by 10, we get 9 with a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 8690305.9
Subtracting 90 from 90 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.

On to step 10:
0 divided by 10 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 8690305.9
Deduct 0 from 0 and we're left 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.

On to step 11:
10 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 8690305.9
If we take 0 away from 0, we end up 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.

Our division results in 8690305.9 with a remaining 0.0.