We look at the division of 173421 by 47 
We want to figure out the number of times 173421 can be divided by 47.

Step 1:
When dividing 1 by 47, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 47

On to step 2:
If we divide 17 by 47, we get 0 and a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 17, we end up with 17.
Fetch the next digit (3) from the dividend, attach it to 17 and continue: 173 / 47

Moving on to step 3:
47 can be fit into 173 3 times, resulting in a remainder of 32.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we subtract 141 from 173, we get 32.
Include the next digit (4) from the dividend after 32, then repeat: 324 / 47

Advancing to step 4:
The number 47 fits into 324 6 times, leaving a remainder of 42.
Record the quotient 6 as the next digit in the result. 
Result so far: 36.0
The remainder is 42 after subtracting 282 from 324.
Include the next digit (2) from the dividend after 42, then repeat: 422 / 47

On to step 5:
The number 47 fits into 422 8 times, leaving a remainder of 46.
Put 8 as the next digit of the answer. 
Result so far: 368.0
Deduct 376 from 422 and we're left with 46.
Append the next digit (1) from the dividend to 46 and continue with: 461 / 47

On to step 6:
461 divided by 47 is 9 with a remainder of 38.
Write down 9 as next digit of the result. 
Result so far: 3689.0
Subtracting 423 from 461 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 7:
380 divided by 47 is 8 with a remainder of 4.
The next digit of our result is 8. 
Result so far: 3689.8
If we take 376 away from 380, 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.

Advancing to step 8:
40 divided by 47 is 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 3689.8
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 9:
When dividing 400 by 47, we get 8 with a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 3689.808
If we take 376 away from 400, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 10:
240 divided by 47 is 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 3689.8085
If we take 235 away from 240, we end up 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:
When dividing 50 by 47, we get 1 with a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 3689.80851
If we subtract 47 from 50, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 12:
47 can be fit into 30 0 times, resulting in a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 3689.80851
If we take 0 away from 30, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 13:
47 goes into 300 6 times with a remainder of 18.
The number 6 becomes the next digit in our result. 
Result so far: 3689.8085106
If we take 282 away from 300, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 14:
47 can be fit into 180 3 times, resulting in a remainder of 39.
The next digit of our result is 3. 
Result so far: 3689.80851063
If we take 141 away from 180, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Our division results in 3689.80851063 with a remaining 3.9e-08.