We look at the division of 51508789 by 64 
Our goal is to divide 51508789 by 64.

Moving on to step 1:
The number 64 fits into 5 0 times, leaving a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 64

Advancing to step 2:
64 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
Subtracting 0 from 51 leaves us with 51.
Append the next digit (5) from the dividend to 51 and continue with: 515 / 64

On to step 3:
The number 64 fits into 515 8 times, leaving a remainder of 3.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we subtract 512 from 515, we get 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 64

Step 4:
64 can be fit into 30 0 times, resulting in a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 80.0
Subtract 0 from 30 to get 30.
Bring next digit (8) of the dividend behind the 30 and repeat the process: 308 / 64

Going ahead to step 5:
308 divided by 64 is 4 with a remainder of 52.
Write down 4 as next digit of the result. 
Result so far: 804.0
Subtracting 256 from 308 leaves us with 52.
Append the next digit (7) from the dividend to 52 and continue with: 527 / 64

On to step 6:
64 can be fit into 527 8 times, resulting in a remainder of 15.
Record the quotient 8 as the next digit in the result. 
Result so far: 8048.0
Deduct 512 from 527 and we're left with 15.
Append the next digit (8) from the dividend to 15 and continue with: 158 / 64

Advancing to step 7:
64 can be fit into 158 2 times, resulting in a remainder of 30.
Use 2 as the next digit of our solution. 
Result so far: 80482.0
Deduct 128 from 158 and we're left with 30.
Grab the next digit (9) from the dividend, add it to 30, then carry on: 309 / 64

Going ahead to step 8:
309 divided by 64 is 4 with a remainder of 53.
The next digit of our result is 4. 
Result so far: 804824.0
Deduct 256 from 309 and we're left with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Step 9:
The number 64 fits into 530 8 times, leaving a remainder of 18.
The number 8 becomes the next digit in our result. 
Result so far: 804824.8
Deduct 512 from 530 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 10:
180 divided by 64 is 2 with a remainder of 52.
Put 2 as the next digit of the answer. 
Result so far: 804824.82
If we take 128 away from 180, 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:
If we divide 520 by 64, we get 8 and a remainder of 8.
Use 8 as the next digit of our solution. 
Result so far: 804824.828
If we subtract 512 from 520, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 12:
64 can be fit into 80 1 times, resulting in a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 804824.8281
If we take 64 away from 80, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 13:
64 goes into 160 2 times with a remainder of 32.
The next digit of our result is 2. 
Result so far: 804824.82812
If we take 128 away from 160, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 14:
320 divided by 64 is 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 804824.828125
If we subtract 320 from 320, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 15:
0 divided by 64 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 804824.828125
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 16:
64 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 804824.828125
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 804824.828125 with a remainder of 0.0.