171986 divided by 77 
Let's see how many times 77 fits into 171986.

Moving on to step 1:
When dividing 1 by 77, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 77

Moving on to step 2:
When dividing 17 by 77, we get 0 with a remainder of 17.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 17 and we're left with 17.
Bring next digit (1) of the dividend behind the 17 and repeat the process: 171 / 77

Going ahead to step 3:
77 goes into 171 2 times with a remainder of 17.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 154 away from 171, we end up with 17.
Append the next digit (9) from the dividend to 17 and continue with: 179 / 77

On to step 4:
When dividing 179 by 77, we get 2 with a remainder of 25.
Use 2 as the next digit of our solution. 
Result so far: 22.0
If we take 154 away from 179, we end up with 25.
Append the next digit (8) from the dividend to 25 and continue with: 258 / 77

Going ahead to step 5:
77 can be fit into 258 3 times, resulting in a remainder of 27.
Record the quotient 3 as the next digit in the result. 
Result so far: 223.0
If we take 231 away from 258, we end up with 27.
Grab the next digit (6) from the dividend, add it to 27, then carry on: 276 / 77

Advancing to step 6:
The number 77 fits into 276 3 times, leaving a remainder of 45.
Record the quotient 3 as the next digit in the result. 
Result so far: 2233.0
Subtract 231 from 276 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Moving on to step 7:
450 divided by 77 is 5 with a remainder of 65.
Write down 5 as next digit of the result. 
Result so far: 2233.5
Deduct 385 from 450 and we're left with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Advancing to step 8:
If we divide 650 by 77, we get 8 and a remainder of 34.
The next digit of our result is 8. 
Result so far: 2233.58
Deduct 616 from 650 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 9:
77 goes into 340 4 times with a remainder of 32.
The next digit of our result is 4. 
Result so far: 2233.584
If we take 308 away from 340, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 10:
The number 77 fits into 320 4 times, leaving a remainder of 12.
The next digit of our result is 4. 
Result so far: 2233.5844
Deduct 308 from 320 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 2233.5844 with a remaining 0.00012.