803521 divided by 64 
We want to divide 803521 by 64.

Let's proceed to step 1:
When dividing 8 by 64, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 64

Advancing to step 2:
The number 64 fits into 80 1 times, leaving a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 16 after subtracting 64 from 80.
Bring next digit (3) of the dividend behind the 16 and repeat the process: 163 / 64

Step 3:
The number 64 fits into 163 2 times, leaving a remainder of 35.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Subtracting 128 from 163 leaves us with 35.
Fetch the next digit (5) from the dividend, attach it to 35 and continue: 355 / 64

Going ahead to step 4:
355 divided by 64 is 5 with a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 125.0
If we take 320 away from 355, we end up with 35.
Bring next digit (2) of the dividend behind the 35 and repeat the process: 352 / 64

Moving on to step 5:
64 can be fit into 352 5 times, resulting in a remainder of 32.
Write down 5 as next digit of the result. 
Result so far: 1255.0
Subtracting 320 from 352 leaves us with 32.
Grab the next digit (1) from the dividend, add it to 32, then carry on: 321 / 64

On to step 6:
64 goes into 321 5 times with a remainder of 1.
Put 5 as the next digit of the answer. 
Result so far: 12555.0
Subtract 320 from 321 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 7:
64 can be fit into 10 0 times, resulting in a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 12555.0
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
When dividing 100 by 64, we get 1 with a remainder of 36.
Write down 1 as next digit of the result. 
Result so far: 12555.01
The remainder is 36 after subtracting 64 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 9:
64 can be fit into 360 5 times, resulting in a remainder of 40.
The number 5 becomes the next digit in our result. 
Result so far: 12555.015
Subtract 320 from 360 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 10:
The number 64 fits into 400 6 times, leaving a remainder of 16.
Write down 6 as next digit of the result. 
Result so far: 12555.0156
Subtract 384 from 400 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 11:
64 goes into 160 2 times with a remainder of 32.
Put 2 as the next digit of the answer. 
Result so far: 12555.01562
Deduct 128 from 160 and we're left 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.

Step 12:
When dividing 320 by 64, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 12555.015625
Subtracting 320 from 320 leaves us 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.

Going ahead to step 13:
64 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 12555.015625
Subtracting 0 from 0 leaves us 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.

Going ahead to step 14:
The number 64 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 12555.015625
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 12555.015625 with a remainder of 0.0.