89978 divided by 12 
We're looking to find how many times 12 goes into 89978.

Step 1:
12 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (9) from the dividend, attach it to 8 and continue: 89 / 12

Going ahead to step 2:
89 divided by 12 is 7 with a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 7.0
The remainder is 5 after subtracting 84 from 89.
Take the next digit (9) from the dividend and append it to 5, then repeat: 59 / 12

Advancing to step 3:
The number 12 fits into 59 4 times, leaving a remainder of 11.
Record the quotient 4 as the next digit in the result. 
Result so far: 74.0
If we subtract 48 from 59, we get 11.
Include the next digit (7) from the dividend after 11, then repeat: 117 / 12

Going ahead to step 4:
If we divide 117 by 12, we get 9 and a remainder of 9.
Record the quotient 9 as the next digit in the result. 
Result so far: 749.0
The remainder is 9 after subtracting 108 from 117.
Bring next digit (8) of the dividend behind the 9 and repeat the process: 98 / 12

On to step 5:
98 divided by 12 is 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 7498.0
Deduct 96 from 98 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 6:
12 can be fit into 20 1 times, resulting in a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 7498.1
Subtract 12 from 20 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 7:
80 divided by 12 is 6 with a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 7498.16
Subtracting 72 from 80 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.

Going ahead to step 8:
When dividing 80 by 12, we get 6 with a remainder of 8.
The next digit of our result is 6. 
Result so far: 7498.166
If we subtract 72 from 80, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Our division results in 7498.166 with a remaining 0.0008.