643968 ÷ 29 
We're looking to find how many times 29 goes into 643968.

Advancing to step 1:
29 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 29

Let's proceed to step 2:
64 divided by 29 is 2 with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 58 away from 64, we end up with 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 29

Step 3:
If we divide 63 by 29, we get 2 and a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 22.0
If we subtract 58 from 63, we get 5.
Append the next digit (9) from the dividend to 5 and continue with: 59 / 29

Let's proceed to step 4:
29 goes into 59 2 times with a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 222.0
The remainder is 1 after subtracting 58 from 59.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 29

Let's proceed to step 5:
The number 29 fits into 16 0 times, leaving a remainder of 16.
Use 0 as the next digit of our solution. 
Result so far: 2220.0
Deduct 0 from 16 and we're left with 16.
Fetch the next digit (8) from the dividend, attach it to 16 and continue: 168 / 29

Moving on to step 6:
168 divided by 29 is 5 with a remainder of 23.
Write down 5 as next digit of the result. 
Result so far: 22205.0
Subtracting 145 from 168 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 7:
When dividing 230 by 29, we get 7 with a remainder of 27.
Put 7 as the next digit of the answer. 
Result so far: 22205.7
Subtracting 203 from 230 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 8:
If we divide 270 by 29, we get 9 and a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 22205.79
Deduct 261 from 270 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 9:
The number 29 fits into 90 3 times, leaving a remainder of 3.
The next digit of our result is 3. 
Result so far: 22205.793
Subtract 87 from 90 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 10:
30 divided by 29 is 1 with a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 22205.7931
Subtract 29 from 30 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 11:
10 divided by 29 is 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 22205.7931
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 12:
If we divide 100 by 29, we get 3 and a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 22205.793103
The remainder is 13 after subtracting 87 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 13:
29 goes into 130 4 times with a remainder of 14.
The number 4 becomes the next digit in our result. 
Result so far: 22205.7931034
If we subtract 116 from 130, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 14:
29 goes into 140 4 times with a remainder of 24.
The next digit of our result is 4. 
Result so far: 22205.79310344
If we subtract 116 from 140, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final result is 22205.79310344 with a remainder of 2.4e-08.