We're dividing 66228991 by 801 
We want to figure out the number of times 66228991 can be divided by 801.

Let's proceed to step 1:
If we divide 6 by 801, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 801

On to step 2:
When dividing 66 by 801, we get 0 with a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Fetch the next digit (2) from the dividend, attach it to 66 and continue: 662 / 801

Going ahead to step 3:
If we divide 662 by 801, we get 0 and a remainder of 662.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 662 leaves us with 662.
Include the next digit (2) from the dividend after 662, then repeat: 6622 / 801

Advancing to step 4:
The number 801 fits into 6622 8 times, leaving a remainder of 214.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we take 6408 away from 6622, we end up with 214.
Grab the next digit (8) from the dividend, add it to 214, then carry on: 2148 / 801

Step 5:
2148 divided by 801 is 2 with a remainder of 546.
Record the quotient 2 as the next digit in the result. 
Result so far: 82.0
The remainder is 546 after subtracting 1602 from 2148.
Fetch the next digit (9) from the dividend, attach it to 546 and continue: 5469 / 801

On to step 6:
801 can be fit into 5469 6 times, resulting in a remainder of 663.
The next digit of our result is 6. 
Result so far: 826.0
Deduct 4806 from 5469 and we're left with 663.
Append the next digit (9) from the dividend to 663 and continue with: 6639 / 801

Moving on to step 7:
801 can be fit into 6639 8 times, resulting in a remainder of 231.
Put 8 as the next digit of the answer. 
Result so far: 8268.0
The remainder is 231 after subtracting 6408 from 6639.
Take the next digit (1) from the dividend and append it to 231, then repeat: 2311 / 801

Moving on to step 8:
If we divide 2311 by 801, we get 2 and a remainder of 709.
Use 2 as the next digit of our solution. 
Result so far: 82682.0
The remainder is 709 after subtracting 1602 from 2311.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7090, and continue the process.

Step 9:
When dividing 7090 by 801, we get 8 with a remainder of 682.
Use 8 as the next digit of our solution. 
Result so far: 82682.8
The remainder is 682 after subtracting 6408 from 7090.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6820, and continue the process.

Going ahead to step 10:
6820 divided by 801 is 8 with a remainder of 412.
The number 8 becomes the next digit in our result. 
Result so far: 82682.88
Subtracting 6408 from 6820 leaves us with 412.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4120, and continue the process.

Our division results in 82682.88 with a remaining 0.412.