318671 ÷ 21 
We want to figure out the number of times 318671 can be divided by 21.

Moving on to step 1:
21 goes into 3 0 times with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 21

Advancing to step 2:
21 can be fit into 31 1 times, resulting in a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 21 from 31 leaves us with 10.
Include the next digit (8) from the dividend after 10, then repeat: 108 / 21

On to step 3:
108 divided by 21 is 5 with a remainder of 3.
The next digit of our result is 5. 
Result so far: 15.0
If we take 105 away from 108, we end up with 3.
Append the next digit (6) from the dividend to 3 and continue with: 36 / 21

Going ahead to step 4:
When dividing 36 by 21, we get 1 with a remainder of 15.
The next digit of our result is 1. 
Result so far: 151.0
If we take 21 away from 36, we end up with 15.
Fetch the next digit (7) from the dividend, attach it to 15 and continue: 157 / 21

Let's proceed to step 5:
21 can be fit into 157 7 times, resulting in a remainder of 10.
The next digit of our result is 7. 
Result so far: 1517.0
If we take 147 away from 157, we end up with 10.
Take the next digit (1) from the dividend and append it to 10, then repeat: 101 / 21

On to step 6:
If we divide 101 by 21, we get 4 and a remainder of 17.
Use 4 as the next digit of our solution. 
Result so far: 15174.0
Deduct 84 from 101 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 7:
21 can be fit into 170 8 times, resulting in a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 15174.8
The remainder is 2 after subtracting 168 from 170.
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:
20 divided by 21 is 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 15174.8
Deduct 0 from 20 and we're left 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.

Going ahead to step 9:
If we divide 200 by 21, we get 9 and a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 15174.809
If we take 189 away from 200, we end up 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.

Going ahead to step 10:
21 goes into 110 5 times with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 15174.8095
Deduct 105 from 110 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 11:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 15174.80952
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.

Advancing to step 12:
When dividing 80 by 21, we get 3 with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 15174.809523
Subtracting 63 from 80 leaves us with 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 13:
21 can be fit into 170 8 times, resulting in a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 15174.8095238
If we take 168 away from 170, we end up with 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:
21 goes into 20 0 times with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 15174.8095238
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 final result is 15174.8095238 with a remainder of 2e-08.