283738 divided by 21 
We're looking to find how many times 21 goes into 283738.

Step 1:
If we divide 2 by 21, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 21

On to step 2:
21 goes into 28 1 times with a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 7 after subtracting 21 from 28.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 21

Going ahead to step 3:
73 divided by 21 is 3 with a remainder of 10.
Write down 3 as next digit of the result. 
Result so far: 13.0
If we subtract 63 from 73, we get 10.
Include the next digit (7) from the dividend after 10, then repeat: 107 / 21

Let's proceed to step 4:
The number 21 fits into 107 5 times, leaving a remainder of 2.
Write down 5 as next digit of the result. 
Result so far: 135.0
Subtract 105 from 107 to get 2.
Take the next digit (3) from the dividend and append it to 2, then repeat: 23 / 21

Going ahead to step 5:
23 divided by 21 is 1 with a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 1351.0
Deduct 21 from 23 and we're left with 2.
Take the next digit (8) from the dividend and append it to 2, then repeat: 28 / 21

Advancing to step 6:
21 goes into 28 1 times with a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 13511.0
Deduct 21 from 28 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
70 divided by 21 is 3 with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 13511.3
The remainder is 7 after subtracting 63 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 8:
When dividing 70 by 21, we get 3 with a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 13511.33
Subtract 63 from 70 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

After the division, we end up with 13511.33 and a remainder of 0.007.