We divide 51529321 by 643
We want to figure out the number of times 51529321 can be divided by 643.

Let's proceed to step 1:
643 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 643

Moving on to step 2:
51 divided by 643 is 0 with 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 / 643

Advancing to step 3:
If we divide 515 by 643, we get 0 and a remainder of 515.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 515 to get 515.
Grab the next digit (2) from the dividend, add it to 515, then carry on: 5152 / 643

On to step 4:
When dividing 5152 by 643, we get 8 with a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtracting 5144 from 5152 leaves us with 8.
Include the next digit (9) from the dividend after 8, then repeat: 89 / 643

Moving on to step 5:
The number 643 fits into 89 0 times, leaving a remainder of 89.
Put 0 as the next digit of the answer. 
Result so far: 80.0
If we take 0 away from 89, we end up with 89.
Include the next digit (3) from the dividend after 89, then repeat: 893 / 643

Going ahead to step 6:
When dividing 893 by 643, we get 1 with a remainder of 250.
The number 1 becomes the next digit in our result. 
Result so far: 801.0
Subtracting 643 from 893 leaves us with 250.
Append the next digit (2) from the dividend to 250 and continue with: 2502 / 643

Moving on to step 7:
643 can be fit into 2502 3 times, resulting in a remainder of 573.
Write down 3 as next digit of the result. 
Result so far: 8013.0
If we take 1929 away from 2502, we end up with 573.
Take the next digit (1) from the dividend and append it to 573, then repeat: 5731 / 643

Let's proceed to step 8:
If we divide 5731 by 643, we get 8 and a remainder of 587.
The number 8 becomes the next digit in our result. 
Result so far: 80138.0
The remainder is 587 after subtracting 5144 from 5731.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5870, and continue the process.

Moving on to step 9:
5870 divided by 643 is 9 with a remainder of 83.
Put 9 as the next digit of the answer. 
Result so far: 80138.9
If we take 5787 away from 5870, we end up with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Moving on to step 10:
The number 643 fits into 830 1 times, leaving a remainder of 187.
Use 1 as the next digit of our solution. 
Result so far: 80138.91
Subtracting 643 from 830 leaves us with 187.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1870, and continue the process.

Step 11:
The number 643 fits into 1870 2 times, leaving a remainder of 584.
The number 2 becomes the next digit in our result. 
Result so far: 80138.912
If we take 1286 away from 1870, we end up with 584.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5840, and continue the process.

Going ahead to step 12:
The number 643 fits into 5840 9 times, leaving a remainder of 53.
Record the quotient 9 as the next digit in the result. 
Result so far: 80138.9129
The remainder is 53 after subtracting 5787 from 5840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Going ahead to step 13:
530 divided by 643 is 0 with a remainder of 530.
Record the quotient 0 as the next digit in the result. 
Result so far: 80138.9129
The remainder is 530 after subtracting 0 from 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

Let's proceed to step 14:
643 goes into 5300 8 times with a remainder of 156.
The number 8 becomes the next digit in our result. 
Result so far: 80138.912908
Subtract 5144 from 5300 to get 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Advancing to step 15:
643 can be fit into 1560 2 times, resulting in a remainder of 274.
The next digit of our result is 2. 
Result so far: 80138.9129082
Subtract 1286 from 1560 to get 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Going ahead to step 16:
2740 divided by 643 is 4 with a remainder of 168.
The number 4 becomes the next digit in our result. 
Result so far: 80138.91290824
If we take 2572 away from 2740, we end up with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

The final outcome is 80138.91290824, with a leftover of 1.68e-07.