We look at the division of 171645 by 70 
We want to figure out the number of times 171645 can be divided by 70.

Step 1:
When dividing 1 by 70, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 70

On to step 2:
17 divided by 70 is 0 with a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 17 to get 17.
Grab the next digit (1) from the dividend, add it to 17, then carry on: 171 / 70

Let's proceed to step 3:
The number 70 fits into 171 2 times, leaving a remainder of 31.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 140 from 171, we get 31.
Bring next digit (6) of the dividend behind the 31 and repeat the process: 316 / 70

Going ahead to step 4:
70 goes into 316 4 times with a remainder of 36.
The number 4 becomes the next digit in our result. 
Result so far: 24.0
Subtracting 280 from 316 leaves us with 36.
Include the next digit (4) from the dividend after 36, then repeat: 364 / 70

On to step 5:
The number 70 fits into 364 5 times, leaving a remainder of 14.
Write down 5 as next digit of the result. 
Result so far: 245.0
If we take 350 away from 364, we end up with 14.
Bring next digit (5) of the dividend behind the 14 and repeat the process: 145 / 70

Going ahead to step 6:
70 goes into 145 2 times with a remainder of 5.
The next digit of our result is 2. 
Result so far: 2452.0
Subtracting 140 from 145 leaves us 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.

Going ahead to step 7:
When dividing 50 by 70, we get 0 with a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 2452.0
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 8:
If we divide 500 by 70, we get 7 and a remainder of 10.
Use 7 as the next digit of our solution. 
Result so far: 2452.07
Subtracting 490 from 500 leaves us 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.

Moving on to step 9:
The number 70 fits into 100 1 times, leaving a remainder of 30.
The next digit of our result is 1. 
Result so far: 2452.071
If we take 70 away from 100, 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.

Moving on to step 10:
When dividing 300 by 70, we get 4 with a remainder of 20.
Record the quotient 4 as the next digit in the result. 
Result so far: 2452.0714
Subtract 280 from 300 to 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.

On to step 11:
200 divided by 70 is 2 with a remainder of 60.
Record the quotient 2 as the next digit in the result. 
Result so far: 2452.07142
Subtract 140 from 200 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 12:
70 goes into 600 8 times with a remainder of 40.
Write down 8 as next digit of the result. 
Result so far: 2452.071428
Subtracting 560 from 600 leaves us 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.

Step 13:
400 divided by 70 is 5 with a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 2452.0714285
Subtract 350 from 400 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 14:
500 divided by 70 is 7 with a remainder of 10.
Write down 7 as next digit of the result. 
Result so far: 2452.07142857
Subtract 490 from 500 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 2452.07142857 with a remainder of 1e-08.