171690 divided by 79 
We want to figure out the number of times 171690 can be divided by 79.

Step 1:
The number 79 fits into 1 0 times, leaving 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.
Fetch the next digit (7) from the dividend, attach it to 1 and continue: 17 / 79

Going ahead to step 2:
79 can be fit into 17 0 times, resulting in a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 17 and we're left with 17.
Fetch the next digit (1) from the dividend, attach it to 17 and continue: 171 / 79

Moving on to step 3:
When dividing 171 by 79, we get 2 with a remainder of 13.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 158 from 171 to get 13.
Take the next digit (6) from the dividend and append it to 13, then repeat: 136 / 79

Going ahead to step 4:
79 can be fit into 136 1 times, resulting in a remainder of 57.
Put 1 as the next digit of the answer. 
Result so far: 21.0
If we take 79 away from 136, we end up with 57.
Fetch the next digit (9) from the dividend, attach it to 57 and continue: 579 / 79

Going ahead to step 5:
79 can be fit into 579 7 times, resulting in a remainder of 26.
The number 7 becomes the next digit in our result. 
Result so far: 217.0
The remainder is 26 after subtracting 553 from 579.
Append the next digit (0) from the dividend to 26 and continue with: 260 / 79

Going ahead to step 6:
The number 79 fits into 260 3 times, leaving a remainder of 23.
Write down 3 as next digit of the result. 
Result so far: 2173.0
If we subtract 237 from 260, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 7:
79 goes into 230 2 times with a remainder of 72.
Record the quotient 2 as the next digit in the result. 
Result so far: 2173.2
Deduct 158 from 230 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 8:
720 divided by 79 is 9 with a remainder of 9.
Write down 9 as next digit of the result. 
Result so far: 2173.29
Subtract 711 from 720 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 9:
90 divided by 79 is 1 with a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 2173.291
Subtract 79 from 90 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 10:
79 can be fit into 110 1 times, resulting in a remainder of 31.
Use 1 as the next digit of our solution. 
Result so far: 2173.2911
If we take 79 away from 110, we end up with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

The final result is 2173.2911 with a remainder of 0.00031.