We divide 538918 by 21
We want to figure out the number of times 538918 can be divided by 21.

Step 1:
5 divided by 21 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 21

Going ahead to step 2:
21 goes into 53 2 times with a remainder of 11.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 11 after subtracting 42 from 53.
Fetch the next digit (8) from the dividend, attach it to 11 and continue: 118 / 21

On to step 3:
118 divided by 21 is 5 with a remainder of 13.
Use 5 as the next digit of our solution. 
Result so far: 25.0
Subtract 105 from 118 to get 13.
Fetch the next digit (9) from the dividend, attach it to 13 and continue: 139 / 21

Going ahead to step 4:
The number 21 fits into 139 6 times, leaving a remainder of 13.
Use 6 as the next digit of our solution. 
Result so far: 256.0
If we subtract 126 from 139, we get 13.
Fetch the next digit (1) from the dividend, attach it to 13 and continue: 131 / 21

On to step 5:
21 can be fit into 131 6 times, resulting in a remainder of 5.
Write down 6 as next digit of the result. 
Result so far: 2566.0
Subtract 126 from 131 to get 5.
Fetch the next digit (8) from the dividend, attach it to 5 and continue: 58 / 21

Step 6:
The number 21 fits into 58 2 times, leaving a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 25662.0
If we subtract 42 from 58, we get 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 7:
160 divided by 21 is 7 with a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 25662.7
The remainder is 13 after subtracting 147 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 8:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 25662.76
Subtract 126 from 130 to 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.

On to step 9:
When dividing 40 by 21, we get 1 with a remainder of 19.
The next digit of our result is 1. 
Result so far: 25662.761
Subtracting 21 from 40 leaves us 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.

Step 10:
21 goes into 190 9 times with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 25662.7619
If we take 189 away from 190, we end up 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.

Let's proceed to step 11:
The number 21 fits into 10 0 times, leaving a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 25662.7619
Subtract 0 from 10 to 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.

Step 12:
The number 21 fits into 100 4 times, leaving a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 25662.761904
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 13:
The number 21 fits into 160 7 times, leaving a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 25662.7619047
The remainder is 13 after subtracting 147 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 14:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 25662.76190476
Subtract 126 from 130 to 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.

Our division results in 25662.76190476 with a remaining 4e-09.