We're dividing 21286432 by 641 
Let's see how many times 641 fits into 21286432.

On to step 1:
641 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 641

Going ahead to step 2:
When dividing 21 by 641, we get 0 with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Take the next digit (2) from the dividend and append it to 21, then repeat: 212 / 641

Step 3:
The number 641 fits into 212 0 times, leaving a remainder of 212.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 212 to get 212.
Include the next digit (8) from the dividend after 212, then repeat: 2128 / 641

Step 4:
If we divide 2128 by 641, we get 3 and a remainder of 205.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 1923 from 2128 to get 205.
Include the next digit (6) from the dividend after 205, then repeat: 2056 / 641

Let's proceed to step 5:
When dividing 2056 by 641, we get 3 with a remainder of 133.
Record the quotient 3 as the next digit in the result. 
Result so far: 33.0
If we take 1923 away from 2056, we end up with 133.
Include the next digit (4) from the dividend after 133, then repeat: 1334 / 641

Going ahead to step 6:
641 goes into 1334 2 times with a remainder of 52.
The next digit of our result is 2. 
Result so far: 332.0
Deduct 1282 from 1334 and we're left with 52.
Grab the next digit (3) from the dividend, add it to 52, then carry on: 523 / 641

Advancing to step 7:
523 divided by 641 is 0 with a remainder of 523.
The number 0 becomes the next digit in our result. 
Result so far: 3320.0
If we subtract 0 from 523, we get 523.
Grab the next digit (2) from the dividend, add it to 523, then carry on: 5232 / 641

Let's proceed to step 8:
If we divide 5232 by 641, we get 8 and a remainder of 104.
The number 8 becomes the next digit in our result. 
Result so far: 33208.0
If we take 5128 away from 5232, we end up with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Step 9:
641 goes into 1040 1 times with a remainder of 399.
The next digit of our result is 1. 
Result so far: 33208.1
Subtract 641 from 1040 to get 399.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3990, and continue the process.

Step 10:
The number 641 fits into 3990 6 times, leaving a remainder of 144.
Write down 6 as next digit of the result. 
Result so far: 33208.16
Deduct 3846 from 3990 and we're left with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Going ahead to step 11:
The number 641 fits into 1440 2 times, leaving a remainder of 158.
Record the quotient 2 as the next digit in the result. 
Result so far: 33208.162
If we subtract 1282 from 1440, we get 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Moving on to step 12:
If we divide 1580 by 641, we get 2 and a remainder of 298.
The next digit of our result is 2. 
Result so far: 33208.1622
Subtract 1282 from 1580 to get 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

After the division, we end up with 33208.1622 and a remainder of 0.00298.