Let's divide 21381275 by 641
Our goal is to divide 21381275 by 641.

Step 1:
If we divide 2 by 641, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 641

Step 2:
641 goes into 21 0 times with a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Take the next digit (3) from the dividend and append it to 21, then repeat: 213 / 641

On to step 3:
If we divide 213 by 641, we get 0 and a remainder of 213.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 213 to get 213.
Include the next digit (8) from the dividend after 213, then repeat: 2138 / 641

Let's proceed to step 4:
If we divide 2138 by 641, we get 3 and a remainder of 215.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtract 1923 from 2138 to get 215.
Take the next digit (1) from the dividend and append it to 215, then repeat: 2151 / 641

Going ahead to step 5:
641 goes into 2151 3 times with a remainder of 228.
Put 3 as the next digit of the answer. 
Result so far: 33.0
Subtract 1923 from 2151 to get 228.
Append the next digit (2) from the dividend to 228 and continue with: 2282 / 641

On to step 6:
641 goes into 2282 3 times with a remainder of 359.
Put 3 as the next digit of the answer. 
Result so far: 333.0
The remainder is 359 after subtracting 1923 from 2282.
Grab the next digit (7) from the dividend, add it to 359, then carry on: 3597 / 641

Moving on to step 7:
The number 641 fits into 3597 5 times, leaving a remainder of 392.
The next digit of our result is 5. 
Result so far: 3335.0
If we subtract 3205 from 3597, we get 392.
Append the next digit (5) from the dividend to 392 and continue with: 3925 / 641

Let's proceed to step 8:
641 goes into 3925 6 times with a remainder of 79.
Put 6 as the next digit of the answer. 
Result so far: 33356.0
Subtract 3846 from 3925 to get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Moving on to step 9:
If we divide 790 by 641, we get 1 and a remainder of 149.
Use 1 as the next digit of our solution. 
Result so far: 33356.1
Deduct 641 from 790 and we're left with 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

Step 10:
641 can be fit into 1490 2 times, resulting in a remainder of 208.
Write down 2 as next digit of the result. 
Result so far: 33356.12
If we take 1282 away from 1490, we end up with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Going ahead to step 11:
641 can be fit into 2080 3 times, resulting in a remainder of 157.
Record the quotient 3 as the next digit in the result. 
Result so far: 33356.123
The remainder is 157 after subtracting 1923 from 2080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1570, and continue the process.

On to step 12:
The number 641 fits into 1570 2 times, leaving a remainder of 288.
Write down 2 as next digit of the result. 
Result so far: 33356.1232
If we take 1282 away from 1570, we end up with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Moving on to step 13:
641 can be fit into 2880 4 times, resulting in a remainder of 316.
Use 4 as the next digit of our solution. 
Result so far: 33356.12324
Subtracting 2564 from 2880 leaves us with 316.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

Step 14:
641 goes into 3160 4 times with a remainder of 596.
The number 4 becomes the next digit in our result. 
Result so far: 33356.123244
If we take 2564 away from 3160, we end up with 596.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5960, and continue the process.

The final outcome is 33356.123244, with a leftover of 5.96e-05.