We're dividing 987538 by 21 
We want to divide 987538 by 21.

On to step 1:
The number 21 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 21

On to step 2:
The number 21 fits into 98 4 times, leaving a remainder of 14.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 84 from 98 leaves us with 14.
Append the next digit (7) from the dividend to 14 and continue with: 147 / 21

Moving on to step 3:
When dividing 147 by 21, we get 7 with a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 47.0
If we take 147 away from 147, we end up with 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 21

Advancing to step 4:
5 divided by 21 is 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 470.0
Subtract 0 from 5 to get 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 21

Let's proceed to step 5:
If we divide 53 by 21, we get 2 and a remainder of 11.
The number 2 becomes the next digit in our result. 
Result so far: 4702.0
Subtract 42 from 53 to get 11.
Fetch the next digit (8) from the dividend, attach it to 11 and continue: 118 / 21

Moving on to step 6:
21 can be fit into 118 5 times, resulting in a remainder of 13.
Put 5 as the next digit of the answer. 
Result so far: 47025.0
Subtract 105 from 118 to 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.

Going ahead to step 7:
21 goes into 130 6 times with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 47025.6
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 8:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 47025.61
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.

Advancing to step 9:
190 divided by 21 is 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 47025.619
Subtracting 189 from 190 leaves us 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.

On to step 10:
10 divided by 21 is 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 47025.619
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.

On to step 11:
When dividing 100 by 21, we get 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 47025.61904
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.

Let's proceed to step 12:
160 divided by 21 is 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 47025.619047
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 13:
130 divided by 21 is 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 47025.6190476
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 14:
When dividing 40 by 21, we get 1 with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 47025.61904761
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The final outcome is 47025.61904761, with a leftover of 1.9e-08.