Let's divide 64331299 by 521
We want to divide 64331299 by 521.

Advancing to step 1:
The number 521 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 521

On to step 2:
521 can be fit into 64 0 times, resulting in a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 64, we get 64.
Grab the next digit (3) from the dividend, add it to 64, then carry on: 643 / 521

Advancing to step 3:
If we divide 643 by 521, we get 1 and a remainder of 122.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 521 from 643 to get 122.
Grab the next digit (3) from the dividend, add it to 122, then carry on: 1223 / 521

On to step 4:
If we divide 1223 by 521, we get 2 and a remainder of 181.
The next digit of our result is 2. 
Result so far: 12.0
If we subtract 1042 from 1223, we get 181.
Include the next digit (1) from the dividend after 181, then repeat: 1811 / 521

Step 5:
When dividing 1811 by 521, we get 3 with a remainder of 248.
Put 3 as the next digit of the answer. 
Result so far: 123.0
If we take 1563 away from 1811, we end up with 248.
Bring next digit (2) of the dividend behind the 248 and repeat the process: 2482 / 521

Going ahead to step 6:
2482 divided by 521 is 4 with a remainder of 398.
Write down 4 as next digit of the result. 
Result so far: 1234.0
If we take 2084 away from 2482, we end up with 398.
Bring next digit (9) of the dividend behind the 398 and repeat the process: 3989 / 521

On to step 7:
When dividing 3989 by 521, we get 7 with a remainder of 342.
Record the quotient 7 as the next digit in the result. 
Result so far: 12347.0
Deduct 3647 from 3989 and we're left with 342.
Include the next digit (9) from the dividend after 342, then repeat: 3429 / 521

Advancing to step 8:
If we divide 3429 by 521, we get 6 and a remainder of 303.
Use 6 as the next digit of our solution. 
Result so far: 123476.0
Deduct 3126 from 3429 and we're left with 303.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3030, and continue the process.

Advancing to step 9:
The number 521 fits into 3030 5 times, leaving a remainder of 425.
The number 5 becomes the next digit in our result. 
Result so far: 123476.5
If we take 2605 away from 3030, we end up with 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

On to step 10:
521 can be fit into 4250 8 times, resulting in a remainder of 82.
The number 8 becomes the next digit in our result. 
Result so far: 123476.58
If we subtract 4168 from 4250, we get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Going ahead to step 11:
When dividing 820 by 521, we get 1 with a remainder of 299.
Put 1 as the next digit of the answer. 
Result so far: 123476.581
If we take 521 away from 820, we end up with 299.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2990, and continue the process.

Let's proceed to step 12:
521 can be fit into 2990 5 times, resulting in a remainder of 385.
Write down 5 as next digit of the result. 
Result so far: 123476.5815
If we subtract 2605 from 2990, we get 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Advancing to step 13:
521 can be fit into 3850 7 times, resulting in a remainder of 203.
Use 7 as the next digit of our solution. 
Result so far: 123476.58157
Subtracting 3647 from 3850 leaves us with 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

On to step 14:
The number 521 fits into 2030 3 times, leaving a remainder of 467.
Use 3 as the next digit of our solution. 
Result so far: 123476.581573
Deduct 1563 from 2030 and we're left with 467.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4670, and continue the process.

Step 15:
If we divide 4670 by 521, we get 8 and a remainder of 502.
Use 8 as the next digit of our solution. 
Result so far: 123476.5815738
If we take 4168 away from 4670, we end up with 502.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5020, and continue the process.

Advancing to step 16:
When dividing 5020 by 521, we get 9 with a remainder of 331.
Put 9 as the next digit of the answer. 
Result so far: 123476.58157389
Subtract 4689 from 5020 to get 331.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

In conclusion, the division gives 123476.58157389 with a balance of 3.31e-07.