We look at the division of 8049329 by 643 
We're looking to find how many times 643 goes into 8049329.

Going ahead to step 1:
The number 643 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 643

Step 2:
When dividing 80 by 643, we get 0 with a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 80 to get 80.
Bring next digit (4) of the dividend behind the 80 and repeat the process: 804 / 643

Moving on to step 3:
The number 643 fits into 804 1 times, leaving a remainder of 161.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 643 from 804 leaves us with 161.
Grab the next digit (9) from the dividend, add it to 161, then carry on: 1619 / 643

Advancing to step 4:
1619 divided by 643 is 2 with a remainder of 333.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Deduct 1286 from 1619 and we're left with 333.
Bring next digit (3) of the dividend behind the 333 and repeat the process: 3333 / 643

Moving on to step 5:
If we divide 3333 by 643, we get 5 and a remainder of 118.
Record the quotient 5 as the next digit in the result. 
Result so far: 125.0
The remainder is 118 after subtracting 3215 from 3333.
Include the next digit (2) from the dividend after 118, then repeat: 1182 / 643

Moving on to step 6:
643 goes into 1182 1 times with a remainder of 539.
Put 1 as the next digit of the answer. 
Result so far: 1251.0
Subtract 643 from 1182 to get 539.
Take the next digit (9) from the dividend and append it to 539, then repeat: 5399 / 643

Let's proceed to step 7:
If we divide 5399 by 643, we get 8 and a remainder of 255.
Write down 8 as next digit of the result. 
Result so far: 12518.0
If we subtract 5144 from 5399, we get 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

On to step 8:
643 can be fit into 2550 3 times, resulting in a remainder of 621.
The next digit of our result is 3. 
Result so far: 12518.3
If we subtract 1929 from 2550, we get 621.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6210, and continue the process.

Let's proceed to step 9:
6210 divided by 643 is 9 with a remainder of 423.
The number 9 becomes the next digit in our result. 
Result so far: 12518.39
Deduct 5787 from 6210 and we're left with 423.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4230, and continue the process.

Let's proceed to step 10:
4230 divided by 643 is 6 with a remainder of 372.
The next digit of our result is 6. 
Result so far: 12518.396
Subtract 3858 from 4230 to get 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Moving on to step 11:
643 goes into 3720 5 times with a remainder of 505.
Put 5 as the next digit of the answer. 
Result so far: 12518.3965
Deduct 3215 from 3720 and we're left with 505.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5050, and continue the process.

Step 12:
When dividing 5050 by 643, we get 7 with a remainder of 549.
The number 7 becomes the next digit in our result. 
Result so far: 12518.39657
Subtract 4501 from 5050 to get 549.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5490, and continue the process.

On to step 13:
5490 divided by 643 is 8 with a remainder of 346.
Use 8 as the next digit of our solution. 
Result so far: 12518.396578
Deduct 5144 from 5490 and we're left with 346.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

Going ahead to step 14:
643 can be fit into 3460 5 times, resulting in a remainder of 245.
The number 5 becomes the next digit in our result. 
Result so far: 12518.3965785
Deduct 3215 from 3460 and we're left with 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Let's proceed to step 15:
The number 643 fits into 2450 3 times, leaving a remainder of 521.
The number 3 becomes the next digit in our result. 
Result so far: 12518.39657853
Subtract 1929 from 2450 to get 521.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5210, and continue the process.

The final outcome is 12518.39657853, with a leftover of 5.21e-07.