42661 divided by 66 
We want to divide 42661 by 66.

Step 1:
If we divide 4 by 66, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 66

Advancing to step 2:
66 goes into 42 0 times with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Append the next digit (6) from the dividend to 42 and continue with: 426 / 66

Moving on to step 3:
426 divided by 66 is 6 with a remainder of 30.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtract 396 from 426 to get 30.
Fetch the next digit (6) from the dividend, attach it to 30 and continue: 306 / 66

Advancing to step 4:
66 goes into 306 4 times with a remainder of 42.
The number 4 becomes the next digit in our result. 
Result so far: 64.0
The remainder is 42 after subtracting 264 from 306.
Fetch the next digit (1) from the dividend, attach it to 42 and continue: 421 / 66

Let's proceed to step 5:
66 can be fit into 421 6 times, resulting in a remainder of 25.
Record the quotient 6 as the next digit in the result. 
Result so far: 646.0
Subtract 396 from 421 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 6:
When dividing 250 by 66, we get 3 with a remainder of 52.
The number 3 becomes the next digit in our result. 
Result so far: 646.3
The remainder is 52 after subtracting 198 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 7:
66 goes into 520 7 times with a remainder of 58.
Record the quotient 7 as the next digit in the result. 
Result so far: 646.37
The remainder is 58 after subtracting 462 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 8:
When dividing 580 by 66, we get 8 with a remainder of 52.
The next digit of our result is 8. 
Result so far: 646.378
Subtract 528 from 580 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 9:
66 goes into 520 7 times with a remainder of 58.
Put 7 as the next digit of the answer. 
Result so far: 646.3787
If we take 462 away from 520, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 10:
The number 66 fits into 580 8 times, leaving a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 646.37878
If we subtract 528 from 580, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 11:
When dividing 520 by 66, we get 7 with a remainder of 58.
Use 7 as the next digit of our solution. 
Result so far: 646.378787
Subtracting 462 from 520 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 12:
The number 66 fits into 580 8 times, leaving a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 646.3787878
Deduct 528 from 580 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 13:
66 can be fit into 520 7 times, resulting in a remainder of 58.
Put 7 as the next digit of the answer. 
Result so far: 646.37878787
If we take 462 away from 520, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

The quotient of the division is 646.37878787, and the remainder is 5.8e-08.