288536 ÷ 21 
We want to figure out the number of times 288536 can be divided by 21.

Step 1:
If we divide 2 by 21, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Take the next digit (8) from the dividend and append it to 2, then repeat: 28 / 21

On to step 2:
If we divide 28 by 21, we get 1 and a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 21 from 28 leaves us with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 21

Advancing to step 3:
The number 21 fits into 78 3 times, leaving a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 13.0
The remainder is 15 after subtracting 63 from 78.
Include the next digit (5) from the dividend after 15, then repeat: 155 / 21

Moving on to step 4:
The number 21 fits into 155 7 times, leaving a remainder of 8.
The number 7 becomes the next digit in our result. 
Result so far: 137.0
The remainder is 8 after subtracting 147 from 155.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 21

Advancing to step 5:
21 can be fit into 83 3 times, resulting in a remainder of 20.
The next digit of our result is 3. 
Result so far: 1373.0
If we take 63 away from 83, we end up with 20.
Append the next digit (6) from the dividend to 20 and continue with: 206 / 21

Let's proceed to step 6:
If we divide 206 by 21, we get 9 and a remainder of 17.
Write down 9 as next digit of the result. 
Result so far: 13739.0
Subtracting 189 from 206 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 7:
When dividing 170 by 21, we get 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 13739.8
Subtracting 168 from 170 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 8:
20 divided by 21 is 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 13739.8
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 9:
21 can be fit into 200 9 times, resulting in a remainder of 11.
The next digit of our result is 9. 
Result so far: 13739.809
If we subtract 189 from 200, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 10:
When dividing 110 by 21, we get 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 13739.8095
Subtracting 105 from 110 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 11:
When dividing 50 by 21, we get 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 13739.80952
The remainder is 8 after subtracting 42 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 12:
The number 21 fits into 80 3 times, leaving a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 13739.809523
Subtract 63 from 80 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 13:
If we divide 170 by 21, we get 8 and a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 13739.8095238
Subtract 168 from 170 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 14:
If we divide 20 by 21, we get 0 and a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 13739.8095238
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The quotient of the division is 13739.8095238, and the remainder is 2e-08.