63643565 ÷ 453 
We want to figure out the number of times 63643565 can be divided by 453.

Advancing to step 1:
If we divide 6 by 453, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 453

On to step 2:
453 can be fit into 63 0 times, resulting in a remainder of 63.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 63, we end up with 63.
Append the next digit (6) from the dividend to 63 and continue with: 636 / 453

Going ahead to step 3:
The number 453 fits into 636 1 times, leaving a remainder of 183.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 453 from 636 leaves us with 183.
Bring next digit (4) of the dividend behind the 183 and repeat the process: 1834 / 453

On to step 4:
453 can be fit into 1834 4 times, resulting in a remainder of 22.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
Subtracting 1812 from 1834 leaves us with 22.
Append the next digit (3) from the dividend to 22 and continue with: 223 / 453

Let's proceed to step 5:
When dividing 223 by 453, we get 0 with a remainder of 223.
Use 0 as the next digit of our solution. 
Result so far: 140.0
Deduct 0 from 223 and we're left with 223.
Fetch the next digit (5) from the dividend, attach it to 223 and continue: 2235 / 453

Let's proceed to step 6:
If we divide 2235 by 453, we get 4 and a remainder of 423.
Write down 4 as next digit of the result. 
Result so far: 1404.0
Subtracting 1812 from 2235 leaves us with 423.
Append the next digit (6) from the dividend to 423 and continue with: 4236 / 453

On to step 7:
The number 453 fits into 4236 9 times, leaving a remainder of 159.
Use 9 as the next digit of our solution. 
Result so far: 14049.0
If we take 4077 away from 4236, we end up with 159.
Take the next digit (5) from the dividend and append it to 159, then repeat: 1595 / 453

Going ahead to step 8:
1595 divided by 453 is 3 with a remainder of 236.
The next digit of our result is 3. 
Result so far: 140493.0
Deduct 1359 from 1595 and we're left with 236.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

Going ahead to step 9:
453 can be fit into 2360 5 times, resulting in a remainder of 95.
The next digit of our result is 5. 
Result so far: 140493.5
If we take 2265 away from 2360, we end up with 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Moving on to step 10:
950 divided by 453 is 2 with a remainder of 44.
Use 2 as the next digit of our solution. 
Result so far: 140493.52
If we subtract 906 from 950, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 11:
453 goes into 440 0 times with a remainder of 440.
The number 0 becomes the next digit in our result. 
Result so far: 140493.52
Deduct 0 from 440 and we're left with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

On to step 12:
453 can be fit into 4400 9 times, resulting in a remainder of 323.
Use 9 as the next digit of our solution. 
Result so far: 140493.5209
Subtract 4077 from 4400 to get 323.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3230, and continue the process.

On to step 13:
The number 453 fits into 3230 7 times, leaving a remainder of 59.
Put 7 as the next digit of the answer. 
Result so far: 140493.52097
Deduct 3171 from 3230 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 14:
The number 453 fits into 590 1 times, leaving a remainder of 137.
The next digit of our result is 1. 
Result so far: 140493.520971
The remainder is 137 after subtracting 453 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

Moving on to step 15:
When dividing 1370 by 453, we get 3 with a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 140493.5209713
If we subtract 1359 from 1370, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 16:
When dividing 110 by 453, we get 0 with a remainder of 110.
Use 0 as the next digit of our solution. 
Result so far: 140493.5209713
Subtract 0 from 110 to get 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

After the division, we end up with 140493.5209713 and a remainder of 1.1e-07.