We're dividing 51644656 by 66 
We want to figure out the number of times 51644656 can be divided by 66.

Let's proceed to step 1:
When dividing 5 by 66, we get 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 66

On to step 2:
66 can be fit into 51 0 times, resulting in a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Take the next digit (6) from the dividend and append it to 51, then repeat: 516 / 66

Moving on to step 3:
66 can be fit into 516 7 times, resulting in a remainder of 54.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtracting 462 from 516 leaves us with 54.
Bring next digit (4) of the dividend behind the 54 and repeat the process: 544 / 66

On to step 4:
66 can be fit into 544 8 times, resulting in a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 78.0
Deduct 528 from 544 and we're left with 16.
Fetch the next digit (4) from the dividend, attach it to 16 and continue: 164 / 66

Advancing to step 5:
If we divide 164 by 66, we get 2 and a remainder of 32.
Record the quotient 2 as the next digit in the result. 
Result so far: 782.0
If we subtract 132 from 164, we get 32.
Append the next digit (6) from the dividend to 32 and continue with: 326 / 66

Going ahead to step 6:
326 divided by 66 is 4 with a remainder of 62.
Write down 4 as next digit of the result. 
Result so far: 7824.0
Subtracting 264 from 326 leaves us with 62.
Grab the next digit (5) from the dividend, add it to 62, then carry on: 625 / 66

Advancing to step 7:
The number 66 fits into 625 9 times, leaving a remainder of 31.
Record the quotient 9 as the next digit in the result. 
Result so far: 78249.0
If we subtract 594 from 625, we get 31.
Take the next digit (6) from the dividend and append it to 31, then repeat: 316 / 66

Step 8:
When dividing 316 by 66, we get 4 with a remainder of 52.
The next digit of our result is 4. 
Result so far: 782494.0
Subtracting 264 from 316 leaves us 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.

Moving on to step 9:
66 can be fit into 520 7 times, resulting in a remainder of 58.
The next digit of our result is 7. 
Result so far: 782494.7
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.

Going ahead to step 10:
The number 66 fits into 580 8 times, leaving a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 782494.78
If we take 528 away from 580, we end up 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.

Advancing to step 11:
66 goes into 520 7 times with a remainder of 58.
Put 7 as the next digit of the answer. 
Result so far: 782494.787
Deduct 462 from 520 and we're left 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.

Step 12:
66 can be fit into 580 8 times, resulting in a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 782494.7878
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.

Step 13:
If we divide 520 by 66, we get 7 and a remainder of 58.
Write down 7 as next digit of the result. 
Result so far: 782494.78787
Subtract 462 from 520 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 14:
When dividing 580 by 66, we get 8 with a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 782494.787878
Subtracting 528 from 580 leaves us 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 15:
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: 782494.7878787
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 16:
66 can be fit into 580 8 times, resulting in a remainder of 52.
Write down 8 as next digit of the result. 
Result so far: 782494.78787878
The remainder is 52 after subtracting 528 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

In conclusion, the division gives 782494.78787878 with a balance of 5.2e-08.