We look at the division of 878985 by 51 
We're looking to find how many times 51 goes into 878985.

Let's proceed to step 1:
The number 51 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 51

On to step 2:
51 can be fit into 87 1 times, resulting in a remainder of 36.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 51 from 87 to get 36.
Fetch the next digit (8) from the dividend, attach it to 36 and continue: 368 / 51

Going ahead to step 3:
When dividing 368 by 51, we get 7 with a remainder of 11.
Write down 7 as next digit of the result. 
Result so far: 17.0
The remainder is 11 after subtracting 357 from 368.
Append the next digit (9) from the dividend to 11 and continue with: 119 / 51

Moving on to step 4:
119 divided by 51 is 2 with a remainder of 17.
Record the quotient 2 as the next digit in the result. 
Result so far: 172.0
The remainder is 17 after subtracting 102 from 119.
Append the next digit (8) from the dividend to 17 and continue with: 178 / 51

Let's proceed to step 5:
The number 51 fits into 178 3 times, leaving a remainder of 25.
Record the quotient 3 as the next digit in the result. 
Result so far: 1723.0
If we subtract 153 from 178, we get 25.
Append the next digit (5) from the dividend to 25 and continue with: 255 / 51

Moving on to step 6:
255 divided by 51 is 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 17235.0
If we subtract 255 from 255, 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.

Let's proceed to step 7:
When dividing 0 by 51, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 17235.0
Subtract 0 from 0 to 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:
If we divide 0 by 51, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 17235.0
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.

Our division results in 17235.0 with a remaining 0.0.