We look at the division of 178117 by 21 
We want to figure out the number of times 178117 can be divided by 21.

Going ahead to step 1:
1 divided by 21 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 21

Let's proceed to step 2:
The number 21 fits into 17 0 times, leaving a remainder of 17.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 17 after subtracting 0 from 17.
Take the next digit (8) from the dividend and append it to 17, then repeat: 178 / 21

Advancing to step 3:
If we divide 178 by 21, we get 8 and a remainder of 10.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtracting 168 from 178 leaves us with 10.
Append the next digit (1) from the dividend to 10 and continue with: 101 / 21

On to step 4:
101 divided by 21 is 4 with a remainder of 17.
The next digit of our result is 4. 
Result so far: 84.0
If we subtract 84 from 101, we get 17.
Append the next digit (1) from the dividend to 17 and continue with: 171 / 21

Going ahead to step 5:
171 divided by 21 is 8 with a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 848.0
Subtracting 168 from 171 leaves us with 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 21

On to step 6:
If we divide 37 by 21, we get 1 and a remainder of 16.
The next digit of our result is 1. 
Result so far: 8481.0
Subtract 21 from 37 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 7:
21 goes into 160 7 times with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 8481.7
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.

Going ahead to step 8:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 8481.76
If we subtract 126 from 130, we get 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 9:
40 divided by 21 is 1 with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 8481.761
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 10:
21 can be fit into 190 9 times, resulting in a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 8481.7619
Deduct 189 from 190 and we're left 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.

Let's proceed to step 11:
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: 8481.7619
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 12:
When dividing 100 by 21, we get 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 8481.761904
If we take 84 away from 100, we end up 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.

Advancing to step 13:
21 goes into 160 7 times with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 8481.7619047
Subtract 147 from 160 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.

Let's proceed to step 14:
When dividing 130 by 21, we get 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 8481.76190476
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.

After the division, we end up with 8481.76190476 and a remainder of 4e-09.