We divide 87666201 by 90
We're looking to find how many times 90 goes into 87666201.

Going ahead to step 1:
90 goes into 8 0 times 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.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 90

On to step 2:
90 goes into 87 0 times with a remainder of 87.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 87, we end up with 87.
Grab the next digit (6) from the dividend, add it to 87, then carry on: 876 / 90

Step 3:
90 goes into 876 9 times with a remainder of 66.
Write down 9 as next digit of the result. 
Result so far: 9.0
Subtract 810 from 876 to get 66.
Take the next digit (6) from the dividend and append it to 66, then repeat: 666 / 90

Let's proceed to step 4:
If we divide 666 by 90, we get 7 and a remainder of 36.
The next digit of our result is 7. 
Result so far: 97.0
The remainder is 36 after subtracting 630 from 666.
Grab the next digit (6) from the dividend, add it to 36, then carry on: 366 / 90

Let's proceed to step 5:
When dividing 366 by 90, we get 4 with a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 974.0
If we subtract 360 from 366, we get 6.
Take the next digit (2) from the dividend and append it to 6, then repeat: 62 / 90

Advancing to step 6:
The number 90 fits into 62 0 times, leaving a remainder of 62.
The number 0 becomes the next digit in our result. 
Result so far: 9740.0
Subtracting 0 from 62 leaves us with 62.
Append the next digit (0) from the dividend to 62 and continue with: 620 / 90

Step 7:
620 divided by 90 is 6 with a remainder of 80.
Write down 6 as next digit of the result. 
Result so far: 97406.0
Deduct 540 from 620 and we're left with 80.
Bring next digit (1) of the dividend behind the 80 and repeat the process: 801 / 90

Let's proceed to step 8:
90 can be fit into 801 8 times, resulting in a remainder of 81.
Use 8 as the next digit of our solution. 
Result so far: 974068.0
If we subtract 720 from 801, we get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 9:
90 goes into 810 9 times with a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 974068.9
If we take 810 away from 810, we end up 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.

Advancing to step 10:
90 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 974068.9
If we take 0 away from 0, we end up 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.

Moving on to step 11:
0 divided by 90 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 974068.9
If we subtract 0 from 0, 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.

After the division, we end up with 974068.9 and a remainder of 0.0.