213621 divided by 66 
We're looking to find how many times 66 goes into 213621.

On to step 1:
66 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 66

Step 2:
When dividing 21 by 66, we get 0 with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Append the next digit (3) from the dividend to 21 and continue with: 213 / 66

Step 3:
If we divide 213 by 66, we get 3 and a remainder of 15.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 198 from 213 and we're left with 15.
Take the next digit (6) from the dividend and append it to 15, then repeat: 156 / 66

Advancing to step 4:
When dividing 156 by 66, we get 2 with a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 32.0
If we take 132 away from 156, we end up with 24.
Fetch the next digit (2) from the dividend, attach it to 24 and continue: 242 / 66

Advancing to step 5:
When dividing 242 by 66, we get 3 with a remainder of 44.
Write down 3 as next digit of the result. 
Result so far: 323.0
The remainder is 44 after subtracting 198 from 242.
Take the next digit (1) from the dividend and append it to 44, then repeat: 441 / 66

Step 6:
441 divided by 66 is 6 with a remainder of 45.
The next digit of our result is 6. 
Result so far: 3236.0
If we subtract 396 from 441, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Let's proceed to step 7:
450 divided by 66 is 6 with a remainder of 54.
The next digit of our result is 6. 
Result so far: 3236.6
The remainder is 54 after subtracting 396 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Going ahead to step 8:
When dividing 540 by 66, we get 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 3236.68
Subtract 528 from 540 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 9:
66 goes into 120 1 times with a remainder of 54.
Record the quotient 1 as the next digit in the result. 
Result so far: 3236.681
Subtracting 66 from 120 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 10:
The number 66 fits into 540 8 times, leaving a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 3236.6818
Subtract 528 from 540 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 11:
The number 66 fits into 120 1 times, leaving a remainder of 54.
The next digit of our result is 1. 
Result so far: 3236.68181
If we subtract 66 from 120, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 12:
66 can be fit into 540 8 times, resulting in a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 3236.681818
Deduct 528 from 540 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 13:
66 can be fit into 120 1 times, resulting in a remainder of 54.
The number 1 becomes the next digit in our result. 
Result so far: 3236.6818181
If we subtract 66 from 120, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 14:
When dividing 540 by 66, we get 8 with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 3236.68181818
Deduct 528 from 540 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 3236.68181818 with a remainder of 1.2e-08.