We're dividing 51644940 by 664 
We're looking to find how many times 664 goes into 51644940.

Step 1:
5 divided by 664 is 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 664

Going ahead to step 2:
51 divided by 664 is 0 with a remainder of 51.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Append the next digit (6) from the dividend to 51 and continue with: 516 / 664

Let's proceed to step 3:
664 goes into 516 0 times with a remainder of 516.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 516 leaves us with 516.
Take the next digit (4) from the dividend and append it to 516, then repeat: 5164 / 664

Going ahead to step 4:
5164 divided by 664 is 7 with a remainder of 516.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtracting 4648 from 5164 leaves us with 516.
Append the next digit (4) from the dividend to 516 and continue with: 5164 / 664

Advancing to step 5:
The number 664 fits into 5164 7 times, leaving a remainder of 516.
The number 7 becomes the next digit in our result. 
Result so far: 77.0
Subtracting 4648 from 5164 leaves us with 516.
Fetch the next digit (9) from the dividend, attach it to 516 and continue: 5169 / 664

Moving on to step 6:
The number 664 fits into 5169 7 times, leaving a remainder of 521.
Record the quotient 7 as the next digit in the result. 
Result so far: 777.0
Subtracting 4648 from 5169 leaves us with 521.
Include the next digit (4) from the dividend after 521, then repeat: 5214 / 664

Advancing to step 7:
If we divide 5214 by 664, we get 7 and a remainder of 566.
The next digit of our result is 7. 
Result so far: 7777.0
If we subtract 4648 from 5214, we get 566.
Fetch the next digit (0) from the dividend, attach it to 566 and continue: 5660 / 664

Step 8:
The number 664 fits into 5660 8 times, leaving a remainder of 348.
Put 8 as the next digit of the answer. 
Result so far: 77778.0
Deduct 5312 from 5660 and we're left with 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

Moving on to step 9:
3480 divided by 664 is 5 with a remainder of 160.
Record the quotient 5 as the next digit in the result. 
Result so far: 77778.5
The remainder is 160 after subtracting 3320 from 3480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Let's proceed to step 10:
664 can be fit into 1600 2 times, resulting in a remainder of 272.
Use 2 as the next digit of our solution. 
Result so far: 77778.52
The remainder is 272 after subtracting 1328 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Moving on to step 11:
664 goes into 2720 4 times with a remainder of 64.
Use 4 as the next digit of our solution. 
Result so far: 77778.524
If we take 2656 away from 2720, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 12:
The number 664 fits into 640 0 times, leaving a remainder of 640.
Put 0 as the next digit of the answer. 
Result so far: 77778.524
Deduct 0 from 640 and we're left with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

On to step 13:
If we divide 6400 by 664, we get 9 and a remainder of 424.
Write down 9 as next digit of the result. 
Result so far: 77778.52409
Deduct 5976 from 6400 and we're left with 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

Let's proceed to step 14:
The number 664 fits into 4240 6 times, leaving a remainder of 256.
Write down 6 as next digit of the result. 
Result so far: 77778.524096
Deduct 3984 from 4240 and we're left with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Step 15:
664 can be fit into 2560 3 times, resulting in a remainder of 568.
The number 3 becomes the next digit in our result. 
Result so far: 77778.5240963
Subtract 1992 from 2560 to get 568.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

Going ahead to step 16:
If we divide 5680 by 664, we get 8 and a remainder of 368.
The next digit of our result is 8. 
Result so far: 77778.52409638
Subtracting 5312 from 5680 leaves us with 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

Our division results in 77778.52409638 with a remaining 3.68e-07.