878753 ÷ 15 
We want to figure out the number of times 878753 can be divided by 15.

Going ahead to step 1:
If we divide 8 by 15, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 15

Advancing to step 2:
87 divided by 15 is 5 with a remainder of 12.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we take 75 away from 87, we end up with 12.
Include the next digit (8) from the dividend after 12, then repeat: 128 / 15

Advancing to step 3:
When dividing 128 by 15, we get 8 with a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 58.0
Subtract 120 from 128 to get 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 15

On to step 4:
When dividing 87 by 15, we get 5 with a remainder of 12.
Put 5 as the next digit of the answer. 
Result so far: 585.0
Deduct 75 from 87 and we're left with 12.
Include the next digit (5) from the dividend after 12, then repeat: 125 / 15

On to step 5:
15 can be fit into 125 8 times, resulting in a remainder of 5.
The next digit of our result is 8. 
Result so far: 5858.0
Subtracting 120 from 125 leaves us with 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 15

Step 6:
15 can be fit into 53 3 times, resulting in a remainder of 8.
The next digit of our result is 3. 
Result so far: 58583.0
Subtracting 45 from 53 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 7:
80 divided by 15 is 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 58583.5
The remainder is 5 after subtracting 75 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 8:
50 divided by 15 is 3 with a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 58583.53
If we take 45 away from 50, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 9:
The number 15 fits into 50 3 times, leaving a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 58583.533
If we take 45 away from 50, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final outcome is 58583.533, with a leftover of 0.0005.