386291 ÷ 21 
We want to divide 386291 by 21.

Let's proceed to step 1:
The number 21 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (8) from the dividend, add it to 3, then carry on: 38 / 21

Step 2:
38 divided by 21 is 1 with a remainder of 17.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 21 away from 38, we end up with 17.
Include the next digit (6) from the dividend after 17, then repeat: 176 / 21

Moving on to step 3:
21 can be fit into 176 8 times, resulting in a remainder of 8.
Put 8 as the next digit of the answer. 
Result so far: 18.0
If we subtract 168 from 176, we get 8.
Grab the next digit (2) from the dividend, add it to 8, then carry on: 82 / 21

Let's proceed to step 4:
If we divide 82 by 21, we get 3 and a remainder of 19.
Put 3 as the next digit of the answer. 
Result so far: 183.0
The remainder is 19 after subtracting 63 from 82.
Take the next digit (9) from the dividend and append it to 19, then repeat: 199 / 21

Step 5:
21 goes into 199 9 times with a remainder of 10.
Put 9 as the next digit of the answer. 
Result so far: 1839.0
The remainder is 10 after subtracting 189 from 199.
Fetch the next digit (1) from the dividend, attach it to 10 and continue: 101 / 21

On to step 6:
101 divided by 21 is 4 with a remainder of 17.
Record the quotient 4 as the next digit in the result. 
Result so far: 18394.0
If we subtract 84 from 101, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 7:
170 divided by 21 is 8 with a remainder of 2.
The next digit of our result is 8. 
Result so far: 18394.8
If we subtract 168 from 170, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 8:
21 goes into 20 0 times with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 18394.8
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
The number 21 fits into 200 9 times, leaving a remainder of 11.
The next digit of our result is 9. 
Result so far: 18394.809
Subtracting 189 from 200 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 10:
21 can be fit into 110 5 times, resulting in a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 18394.8095
If we subtract 105 from 110, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 11:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 18394.80952
Subtract 42 from 50 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 12:
80 divided by 21 is 3 with a remainder of 17.
The next digit of our result is 3. 
Result so far: 18394.809523
Subtract 63 from 80 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 13:
If we divide 170 by 21, we get 8 and a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 18394.8095238
Subtract 168 from 170 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 14:
20 divided by 21 is 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 18394.8095238
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The quotient of the division is 18394.8095238, and the remainder is 2e-08.