Let's divide 311486 by 21
We want to divide 311486 by 21.

Let's proceed to step 1:
The number 21 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 21

Let's proceed to step 2:
21 can be fit into 31 1 times, resulting in a remainder of 10.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 21 from 31, we get 10.
Bring next digit (1) of the dividend behind the 10 and repeat the process: 101 / 21

Step 3:
The number 21 fits into 101 4 times, leaving a remainder of 17.
Write down 4 as next digit of the result. 
Result so far: 14.0
Deduct 84 from 101 and we're left with 17.
Bring next digit (4) of the dividend behind the 17 and repeat the process: 174 / 21

Going ahead to step 4:
174 divided by 21 is 8 with a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 148.0
Subtracting 168 from 174 leaves us with 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 21

Moving on to step 5:
When dividing 68 by 21, we get 3 with a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 1483.0
If we subtract 63 from 68, we get 5.
Append the next digit (6) from the dividend to 5 and continue with: 56 / 21

Step 6:
56 divided by 21 is 2 with a remainder of 14.
Record the quotient 2 as the next digit in the result. 
Result so far: 14832.0
Subtracting 42 from 56 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 7:
If we divide 140 by 21, we get 6 and a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 14832.6
Deduct 126 from 140 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 8:
21 can be fit into 140 6 times, resulting in a remainder of 14.
Use 6 as the next digit of our solution. 
Result so far: 14832.66
Deduct 126 from 140 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The quotient of the division is 14832.66, and the remainder is 0.014.