We look at the division of 66831989 by 405 
Our goal is to divide 66831989 by 405.

On to step 1:
If we divide 6 by 405, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 405

Let's proceed to step 2:
The number 405 fits into 66 0 times, leaving a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Append the next digit (8) from the dividend to 66 and continue with: 668 / 405

Going ahead to step 3:
If we divide 668 by 405, we get 1 and a remainder of 263.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 405 from 668 leaves us with 263.
Append the next digit (3) from the dividend to 263 and continue with: 2633 / 405

Going ahead to step 4:
405 can be fit into 2633 6 times, resulting in a remainder of 203.
Use 6 as the next digit of our solution. 
Result so far: 16.0
If we subtract 2430 from 2633, we get 203.
Append the next digit (1) from the dividend to 203 and continue with: 2031 / 405

Step 5:
2031 divided by 405 is 5 with a remainder of 6.
Write down 5 as next digit of the result. 
Result so far: 165.0
Subtracting 2025 from 2031 leaves us with 6.
Grab the next digit (9) from the dividend, add it to 6, then carry on: 69 / 405

Moving on to step 6:
405 goes into 69 0 times with a remainder of 69.
Write down 0 as next digit of the result. 
Result so far: 1650.0
If we take 0 away from 69, we end up with 69.
Grab the next digit (8) from the dividend, add it to 69, then carry on: 698 / 405

Advancing to step 7:
698 divided by 405 is 1 with a remainder of 293.
The number 1 becomes the next digit in our result. 
Result so far: 16501.0
Deduct 405 from 698 and we're left with 293.
Append the next digit (9) from the dividend to 293 and continue with: 2939 / 405

Going ahead to step 8:
If we divide 2939 by 405, we get 7 and a remainder of 104.
Put 7 as the next digit of the answer. 
Result so far: 165017.0
The remainder is 104 after subtracting 2835 from 2939.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Moving on to step 9:
The number 405 fits into 1040 2 times, leaving a remainder of 230.
Put 2 as the next digit of the answer. 
Result so far: 165017.2
Subtract 810 from 1040 to get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Step 10:
The number 405 fits into 2300 5 times, leaving a remainder of 275.
The next digit of our result is 5. 
Result so far: 165017.25
Subtract 2025 from 2300 to get 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Advancing to step 11:
If we divide 2750 by 405, we get 6 and a remainder of 320.
The number 6 becomes the next digit in our result. 
Result so far: 165017.256
Deduct 2430 from 2750 and we're left with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Moving on to step 12:
405 goes into 3200 7 times with a remainder of 365.
The next digit of our result is 7. 
Result so far: 165017.2567
If we take 2835 away from 3200, we end up with 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Going ahead to step 13:
The number 405 fits into 3650 9 times, leaving a remainder of 5.
Record the quotient 9 as the next digit in the result. 
Result so far: 165017.25679
Subtracting 3645 from 3650 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 14:
The number 405 fits into 50 0 times, leaving a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 165017.25679
Deduct 0 from 50 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 15:
405 goes into 500 1 times with a remainder of 95.
The next digit of our result is 1. 
Result so far: 165017.2567901
Subtract 405 from 500 to get 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Let's proceed to step 16:
When dividing 950 by 405, we get 2 with a remainder of 140.
The number 2 becomes the next digit in our result. 
Result so far: 165017.25679012
The remainder is 140 after subtracting 810 from 950.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

After the division, we end up with 165017.25679012 and a remainder of 1.4e-07.