We're dividing 86917842 by 978 
We want to divide 86917842 by 978.

Step 1:
The number 978 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 978

Let's proceed to step 2:
If we divide 86 by 978, we get 0 and a remainder of 86.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Include the next digit (9) from the dividend after 86, then repeat: 869 / 978

Advancing to step 3:
869 divided by 978 is 0 with a remainder of 869.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 869, we get 869.
Take the next digit (1) from the dividend and append it to 869, then repeat: 8691 / 978

Going ahead to step 4:
978 can be fit into 8691 8 times, resulting in a remainder of 867.
Put 8 as the next digit of the answer. 
Result so far: 8.0
The remainder is 867 after subtracting 7824 from 8691.
Bring next digit (7) of the dividend behind the 867 and repeat the process: 8677 / 978

Going ahead to step 5:
8677 divided by 978 is 8 with a remainder of 853.
Write down 8 as next digit of the result. 
Result so far: 88.0
Subtracting 7824 from 8677 leaves us with 853.
Include the next digit (8) from the dividend after 853, then repeat: 8538 / 978

Moving on to step 6:
8538 divided by 978 is 8 with a remainder of 714.
Put 8 as the next digit of the answer. 
Result so far: 888.0
Subtracting 7824 from 8538 leaves us with 714.
Append the next digit (4) from the dividend to 714 and continue with: 7144 / 978

On to step 7:
978 goes into 7144 7 times with a remainder of 298.
Put 7 as the next digit of the answer. 
Result so far: 8887.0
The remainder is 298 after subtracting 6846 from 7144.
Include the next digit (2) from the dividend after 298, then repeat: 2982 / 978

On to step 8:
2982 divided by 978 is 3 with a remainder of 48.
Write down 3 as next digit of the result. 
Result so far: 88873.0
If we subtract 2934 from 2982, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 9:
The number 978 fits into 480 0 times, leaving a remainder of 480.
Use 0 as the next digit of our solution. 
Result so far: 88873.0
Deduct 0 from 480 and we're left with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Step 10:
The number 978 fits into 4800 4 times, leaving a remainder of 888.
The number 4 becomes the next digit in our result. 
Result so far: 88873.04
Deduct 3912 from 4800 and we're left with 888.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8880, and continue the process.

Step 11:
The number 978 fits into 8880 9 times, leaving a remainder of 78.
Write down 9 as next digit of the result. 
Result so far: 88873.049
Deduct 8802 from 8880 and we're left with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

On to step 12:
978 goes into 780 0 times with a remainder of 780.
The number 0 becomes the next digit in our result. 
Result so far: 88873.049
Deduct 0 from 780 and we're left with 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7800, and continue the process.

Advancing to step 13:
978 goes into 7800 7 times with a remainder of 954.
Use 7 as the next digit of our solution. 
Result so far: 88873.04907
Subtract 6846 from 7800 to get 954.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9540, and continue the process.

Moving on to step 14:
When dividing 9540 by 978, we get 9 with a remainder of 738.
Record the quotient 9 as the next digit in the result. 
Result so far: 88873.049079
Subtract 8802 from 9540 to get 738.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7380, and continue the process.

Moving on to step 15:
If we divide 7380 by 978, we get 7 and a remainder of 534.
The next digit of our result is 7. 
Result so far: 88873.0490797
If we subtract 6846 from 7380, we get 534.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5340, and continue the process.

Going ahead to step 16:
978 can be fit into 5340 5 times, resulting in a remainder of 450.
Record the quotient 5 as the next digit in the result. 
Result so far: 88873.04907975
Deduct 4890 from 5340 and we're left with 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

The final result is 88873.04907975 with a remainder of 4.5e-07.