21767261 ÷ 643 
Let's see how many times 643 fits into 21767261.

On to step 1:
643 can be fit into 2 0 times, resulting in a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 643

On to step 2:
If we divide 21 by 643, we get 0 and a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Fetch the next digit (7) from the dividend, attach it to 21 and continue: 217 / 643

Going ahead to step 3:
When dividing 217 by 643, we get 0 with a remainder of 217.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 217 and we're left with 217.
Fetch the next digit (6) from the dividend, attach it to 217 and continue: 2176 / 643

On to step 4:
643 can be fit into 2176 3 times, resulting in a remainder of 247.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we take 1929 away from 2176, we end up with 247.
Fetch the next digit (7) from the dividend, attach it to 247 and continue: 2477 / 643

Let's proceed to step 5:
When dividing 2477 by 643, we get 3 with a remainder of 548.
The number 3 becomes the next digit in our result. 
Result so far: 33.0
Deduct 1929 from 2477 and we're left with 548.
Fetch the next digit (2) from the dividend, attach it to 548 and continue: 5482 / 643

On to step 6:
5482 divided by 643 is 8 with a remainder of 338.
The number 8 becomes the next digit in our result. 
Result so far: 338.0
The remainder is 338 after subtracting 5144 from 5482.
Include the next digit (6) from the dividend after 338, then repeat: 3386 / 643

On to step 7:
3386 divided by 643 is 5 with a remainder of 171.
The next digit of our result is 5. 
Result so far: 3385.0
Subtracting 3215 from 3386 leaves us with 171.
Include the next digit (1) from the dividend after 171, then repeat: 1711 / 643

On to step 8:
643 goes into 1711 2 times with a remainder of 425.
The number 2 becomes the next digit in our result. 
Result so far: 33852.0
If we take 1286 away from 1711, we end up with 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

On to step 9:
643 can be fit into 4250 6 times, resulting in a remainder of 392.
Record the quotient 6 as the next digit in the result. 
Result so far: 33852.6
If we take 3858 away from 4250, we end up with 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

Let's proceed to step 10:
643 can be fit into 3920 6 times, resulting in a remainder of 62.
Put 6 as the next digit of the answer. 
Result so far: 33852.66
The remainder is 62 after subtracting 3858 from 3920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

The final outcome is 33852.66, with a leftover of 0.062.