We're dividing 80666879 by 89 
We want to figure out the number of times 80666879 can be divided by 89.

Step 1:
89 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 89

Moving on to step 2:
89 can be fit into 80 0 times, resulting in a remainder of 80.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 80 after subtracting 0 from 80.
Include the next digit (6) from the dividend after 80, then repeat: 806 / 89

Advancing to step 3:
If we divide 806 by 89, we get 9 and a remainder of 5.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Deduct 801 from 806 and we're left with 5.
Append the next digit (6) from the dividend to 5 and continue with: 56 / 89

Going ahead to step 4:
When dividing 56 by 89, we get 0 with a remainder of 56.
The next digit of our result is 0. 
Result so far: 90.0
The remainder is 56 after subtracting 0 from 56.
Append the next digit (6) from the dividend to 56 and continue with: 566 / 89

Moving on to step 5:
When dividing 566 by 89, we get 6 with a remainder of 32.
The number 6 becomes the next digit in our result. 
Result so far: 906.0
If we take 534 away from 566, we end up with 32.
Append the next digit (8) from the dividend to 32 and continue with: 328 / 89

Advancing to step 6:
If we divide 328 by 89, we get 3 and a remainder of 61.
Record the quotient 3 as the next digit in the result. 
Result so far: 9063.0
If we subtract 267 from 328, we get 61.
Bring next digit (7) of the dividend behind the 61 and repeat the process: 617 / 89

On to step 7:
If we divide 617 by 89, we get 6 and a remainder of 83.
Write down 6 as next digit of the result. 
Result so far: 90636.0
If we take 534 away from 617, we end up with 83.
Bring next digit (9) of the dividend behind the 83 and repeat the process: 839 / 89

On to step 8:
89 goes into 839 9 times with a remainder of 38.
The number 9 becomes the next digit in our result. 
Result so far: 906369.0
Deduct 801 from 839 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 9:
89 can be fit into 380 4 times, resulting in a remainder of 24.
Write down 4 as next digit of the result. 
Result so far: 906369.4
Subtracting 356 from 380 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 10:
When dividing 240 by 89, we get 2 with a remainder of 62.
The number 2 becomes the next digit in our result. 
Result so far: 906369.42
If we take 178 away from 240, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Let's proceed to step 11:
When dividing 620 by 89, we get 6 with a remainder of 86.
The number 6 becomes the next digit in our result. 
Result so far: 906369.426
If we take 534 away from 620, we end up with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Let's proceed to step 12:
If we divide 860 by 89, we get 9 and a remainder of 59.
Record the quotient 9 as the next digit in the result. 
Result so far: 906369.4269
Deduct 801 from 860 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 13:
590 divided by 89 is 6 with a remainder of 56.
The number 6 becomes the next digit in our result. 
Result so far: 906369.42696
The remainder is 56 after subtracting 534 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Step 14:
89 goes into 560 6 times with a remainder of 26.
Put 6 as the next digit of the answer. 
Result so far: 906369.426966
Subtracting 534 from 560 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

In conclusion, the division gives 906369.426966 with a balance of 2.6e-06.