We're dividing 78910687 by 900 
Our goal is to divide 78910687 by 900.

Advancing to step 1:
When dividing 7 by 900, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 900

Moving on to step 2:
When dividing 78 by 900, we get 0 with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Fetch the next digit (9) from the dividend, attach it to 78 and continue: 789 / 900

Advancing to step 3:
789 divided by 900 is 0 with a remainder of 789.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 789, we get 789.
Append the next digit (1) from the dividend to 789 and continue with: 7891 / 900

Advancing to step 4:
When dividing 7891 by 900, we get 8 with a remainder of 691.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Deduct 7200 from 7891 and we're left with 691.
Append the next digit (0) from the dividend to 691 and continue with: 6910 / 900

Let's proceed to step 5:
The number 900 fits into 6910 7 times, leaving a remainder of 610.
Write down 7 as next digit of the result. 
Result so far: 87.0
The remainder is 610 after subtracting 6300 from 6910.
Append the next digit (6) from the dividend to 610 and continue with: 6106 / 900

Let's proceed to step 6:
6106 divided by 900 is 6 with a remainder of 706.
Put 6 as the next digit of the answer. 
Result so far: 876.0
Deduct 5400 from 6106 and we're left with 706.
Grab the next digit (8) from the dividend, add it to 706, then carry on: 7068 / 900

Going ahead to step 7:
900 can be fit into 7068 7 times, resulting in a remainder of 768.
The number 7 becomes the next digit in our result. 
Result so far: 8767.0
Subtracting 6300 from 7068 leaves us with 768.
Take the next digit (7) from the dividend and append it to 768, then repeat: 7687 / 900

Let's proceed to step 8:
When dividing 7687 by 900, we get 8 with a remainder of 487.
Use 8 as the next digit of our solution. 
Result so far: 87678.0
Deduct 7200 from 7687 and we're left with 487.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4870, and continue the process.

Let's proceed to step 9:
The number 900 fits into 4870 5 times, leaving a remainder of 370.
The number 5 becomes the next digit in our result. 
Result so far: 87678.5
If we take 4500 away from 4870, we end up with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

On to step 10:
900 goes into 3700 4 times with a remainder of 100.
Use 4 as the next digit of our solution. 
Result so far: 87678.54
Subtracting 3600 from 3700 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 11:
900 can be fit into 1000 1 times, resulting in a remainder of 100.
Use 1 as the next digit of our solution. 
Result so far: 87678.541
Subtracting 900 from 1000 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

On to step 12:
1000 divided by 900 is 1 with a remainder of 100.
The number 1 becomes the next digit in our result. 
Result so far: 87678.5411
Subtract 900 from 1000 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The final outcome is 87678.5411, with a leftover of 0.001.