89137215 divided by 666 
We want to figure out the number of times 89137215 can be divided by 666.

On to step 1:
When dividing 8 by 666, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (9) from the dividend to 8 and continue with: 89 / 666

Going ahead to step 2:
When dividing 89 by 666, we get 0 with a remainder of 89.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 89, we end up with 89.
Grab the next digit (1) from the dividend, add it to 89, then carry on: 891 / 666

Step 3:
891 divided by 666 is 1 with a remainder of 225.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 666 from 891 to get 225.
Append the next digit (3) from the dividend to 225 and continue with: 2253 / 666

Advancing to step 4:
666 goes into 2253 3 times with a remainder of 255.
Write down 3 as next digit of the result. 
Result so far: 13.0
If we subtract 1998 from 2253, we get 255.
Take the next digit (7) from the dividend and append it to 255, then repeat: 2557 / 666

Moving on to step 5:
2557 divided by 666 is 3 with a remainder of 559.
Record the quotient 3 as the next digit in the result. 
Result so far: 133.0
Subtracting 1998 from 2557 leaves us with 559.
Include the next digit (2) from the dividend after 559, then repeat: 5592 / 666

Step 6:
5592 divided by 666 is 8 with a remainder of 264.
Record the quotient 8 as the next digit in the result. 
Result so far: 1338.0
Deduct 5328 from 5592 and we're left with 264.
Append the next digit (1) from the dividend to 264 and continue with: 2641 / 666

Going ahead to step 7:
The number 666 fits into 2641 3 times, leaving a remainder of 643.
Write down 3 as next digit of the result. 
Result so far: 13383.0
If we take 1998 away from 2641, we end up with 643.
Grab the next digit (5) from the dividend, add it to 643, then carry on: 6435 / 666

Going ahead to step 8:
If we divide 6435 by 666, we get 9 and a remainder of 441.
The number 9 becomes the next digit in our result. 
Result so far: 133839.0
If we take 5994 away from 6435, we end up with 441.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4410, and continue the process.

Moving on to step 9:
666 can be fit into 4410 6 times, resulting in a remainder of 414.
Use 6 as the next digit of our solution. 
Result so far: 133839.6
Subtracting 3996 from 4410 leaves us with 414.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4140, and continue the process.

Going ahead to step 10:
If we divide 4140 by 666, we get 6 and a remainder of 144.
Use 6 as the next digit of our solution. 
Result so far: 133839.66
The remainder is 144 after subtracting 3996 from 4140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

After the division, we end up with 133839.66 and a remainder of 0.144.