286522 ÷ 21 
We're looking to find how many times 21 goes into 286522.

Advancing to step 1:
21 can be fit into 2 0 times, resulting in a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 21

Going ahead to step 2:
28 divided by 21 is 1 with a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 21 away from 28, we end up with 7.
Fetch the next digit (6) from the dividend, attach it to 7 and continue: 76 / 21

Moving on to step 3:
The number 21 fits into 76 3 times, leaving a remainder of 13.
The next digit of our result is 3. 
Result so far: 13.0
If we take 63 away from 76, we end up with 13.
Fetch the next digit (5) from the dividend, attach it to 13 and continue: 135 / 21

Advancing to step 4:
135 divided by 21 is 6 with a remainder of 9.
The next digit of our result is 6. 
Result so far: 136.0
If we take 126 away from 135, we end up with 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 21

Going ahead to step 5:
21 goes into 92 4 times with a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 1364.0
Subtracting 84 from 92 leaves us with 8.
Include the next digit (2) from the dividend after 8, then repeat: 82 / 21

Let's proceed to step 6:
21 goes into 82 3 times with a remainder of 19.
Record the quotient 3 as the next digit in the result. 
Result so far: 13643.0
Deduct 63 from 82 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 7:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 13643.9
The remainder is 1 after subtracting 189 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 8:
When dividing 10 by 21, we get 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 13643.9
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 9:
If we divide 100 by 21, we get 4 and a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 13643.904
Subtracting 84 from 100 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 10:
21 goes into 160 7 times with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 13643.9047
If we subtract 147 from 160, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 11:
When dividing 130 by 21, we get 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 13643.90476
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 12:
When dividing 40 by 21, we get 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 13643.904761
If we take 21 away from 40, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 13:
The number 21 fits into 190 9 times, leaving a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 13643.9047619
Deduct 189 from 190 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 14:
When dividing 10 by 21, we get 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 13643.9047619
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 13643.9047619 and a remainder of 1e-08.