43555212 ÷ 66 
We want to figure out the number of times 43555212 can be divided by 66.

Going ahead to step 1:
66 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 66

Going ahead to step 2:
43 divided by 66 is 0 with a remainder of 43.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 43 to get 43.
Append the next digit (5) from the dividend to 43 and continue with: 435 / 66

Step 3:
The number 66 fits into 435 6 times, leaving a remainder of 39.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Deduct 396 from 435 and we're left with 39.
Include the next digit (5) from the dividend after 39, then repeat: 395 / 66

Moving on to step 4:
If we divide 395 by 66, we get 5 and a remainder of 65.
Put 5 as the next digit of the answer. 
Result so far: 65.0
Deduct 330 from 395 and we're left with 65.
Grab the next digit (5) from the dividend, add it to 65, then carry on: 655 / 66

Going ahead to step 5:
When dividing 655 by 66, we get 9 with a remainder of 61.
Use 9 as the next digit of our solution. 
Result so far: 659.0
Subtract 594 from 655 to get 61.
Bring next digit (2) of the dividend behind the 61 and repeat the process: 612 / 66

Going ahead to step 6:
When dividing 612 by 66, we get 9 with a remainder of 18.
Record the quotient 9 as the next digit in the result. 
Result so far: 6599.0
The remainder is 18 after subtracting 594 from 612.
Fetch the next digit (1) from the dividend, attach it to 18 and continue: 181 / 66

Going ahead to step 7:
If we divide 181 by 66, we get 2 and a remainder of 49.
Put 2 as the next digit of the answer. 
Result so far: 65992.0
Deduct 132 from 181 and we're left with 49.
Bring next digit (2) of the dividend behind the 49 and repeat the process: 492 / 66

Step 8:
The number 66 fits into 492 7 times, leaving a remainder of 30.
Use 7 as the next digit of our solution. 
Result so far: 659927.0
The remainder is 30 after subtracting 462 from 492.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 9:
66 can be fit into 300 4 times, resulting in a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 659927.4
If we subtract 264 from 300, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 10:
The number 66 fits into 360 5 times, leaving a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 659927.45
Deduct 330 from 360 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 11:
300 divided by 66 is 4 with a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 659927.454
If we take 264 away from 300, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 12:
If we divide 360 by 66, we get 5 and a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 659927.4545
If we subtract 330 from 360, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 13:
300 divided by 66 is 4 with a remainder of 36.
Record the quotient 4 as the next digit in the result. 
Result so far: 659927.45454
Subtracting 264 from 300 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 14:
If we divide 360 by 66, we get 5 and a remainder of 30.
The next digit of our result is 5. 
Result so far: 659927.454545
Subtracting 330 from 360 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 15:
The number 66 fits into 300 4 times, leaving a remainder of 36.
Write down 4 as next digit of the result. 
Result so far: 659927.4545454
The remainder is 36 after subtracting 264 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 16:
If we divide 360 by 66, we get 5 and a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 659927.45454545
Deduct 330 from 360 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

In conclusion, the division gives 659927.45454545 with a balance of 3e-08.