We divide 158935 by 21
Our goal is to divide 158935 by 21.

On to step 1:
When dividing 1 by 21, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 21

Moving on to step 2:
The number 21 fits into 15 0 times, leaving a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Fetch the next digit (8) from the dividend, attach it to 15 and continue: 158 / 21

On to step 3:
The number 21 fits into 158 7 times, leaving a remainder of 11.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Deduct 147 from 158 and we're left with 11.
Bring next digit (9) of the dividend behind the 11 and repeat the process: 119 / 21

Moving on to step 4:
21 can be fit into 119 5 times, resulting in a remainder of 14.
Record the quotient 5 as the next digit in the result. 
Result so far: 75.0
If we subtract 105 from 119, we get 14.
Fetch the next digit (3) from the dividend, attach it to 14 and continue: 143 / 21

Step 5:
The number 21 fits into 143 6 times, leaving a remainder of 17.
Record the quotient 6 as the next digit in the result. 
Result so far: 756.0
Subtracting 126 from 143 leaves us with 17.
Take the next digit (5) from the dividend and append it to 17, then repeat: 175 / 21

On to step 6:
If we divide 175 by 21, we get 8 and a remainder of 7.
The next digit of our result is 8. 
Result so far: 7568.0
If we subtract 168 from 175, we 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.

Step 7:
When dividing 70 by 21, we get 3 with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 7568.3
Subtracting 63 from 70 leaves us 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.

Moving on to step 8:
21 goes into 70 3 times with a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 7568.33
If we take 63 away from 70, we end up 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.

The quotient of the division is 7568.33, and the remainder is 0.007.