643021 divided by 68 
We want to figure out the number of times 643021 can be divided by 68.

Step 1:
68 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 68

On to step 2:
68 can be fit into 64 0 times, resulting in a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Take the next digit (3) from the dividend and append it to 64, then repeat: 643 / 68

Let's proceed to step 3:
68 goes into 643 9 times with a remainder of 31.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we take 612 away from 643, we end up with 31.
Grab the next digit (0) from the dividend, add it to 31, then carry on: 310 / 68

Step 4:
68 can be fit into 310 4 times, resulting in a remainder of 38.
Put 4 as the next digit of the answer. 
Result so far: 94.0
Deduct 272 from 310 and we're left with 38.
Bring next digit (2) of the dividend behind the 38 and repeat the process: 382 / 68

Step 5:
If we divide 382 by 68, we get 5 and a remainder of 42.
The next digit of our result is 5. 
Result so far: 945.0
The remainder is 42 after subtracting 340 from 382.
Bring next digit (1) of the dividend behind the 42 and repeat the process: 421 / 68

Step 6:
421 divided by 68 is 6 with a remainder of 13.
Put 6 as the next digit of the answer. 
Result so far: 9456.0
If we take 408 away from 421, we end up with 13.
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 7:
130 divided by 68 is 1 with a remainder of 62.
Write down 1 as next digit of the result. 
Result so far: 9456.1
If we subtract 68 from 130, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 8:
The number 68 fits into 620 9 times, leaving a remainder of 8.
Use 9 as the next digit of our solution. 
Result so far: 9456.19
The remainder is 8 after subtracting 612 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 9:
80 divided by 68 is 1 with a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 9456.191
Subtract 68 from 80 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 10:
If we divide 120 by 68, we get 1 and a remainder of 52.
Use 1 as the next digit of our solution. 
Result so far: 9456.1911
Deduct 68 from 120 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

After the division, we end up with 9456.1911 and a remainder of 0.00052.