77131780 ÷ 171 
We want to figure out the number of times 77131780 can be divided by 171.

Going ahead to step 1:
171 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 171

Moving on to step 2:
When dividing 77 by 171, we get 0 with a remainder of 77.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 77 to get 77.
Fetch the next digit (1) from the dividend, attach it to 77 and continue: 771 / 171

On to step 3:
The number 171 fits into 771 4 times, leaving a remainder of 87.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtract 684 from 771 to get 87.
Grab the next digit (3) from the dividend, add it to 87, then carry on: 873 / 171

Advancing to step 4:
When dividing 873 by 171, we get 5 with a remainder of 18.
Put 5 as the next digit of the answer. 
Result so far: 45.0
Subtracting 855 from 873 leaves us with 18.
Bring next digit (1) of the dividend behind the 18 and repeat the process: 181 / 171

Step 5:
The number 171 fits into 181 1 times, leaving a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 451.0
Deduct 171 from 181 and we're left with 10.
Take the next digit (7) from the dividend and append it to 10, then repeat: 107 / 171

Advancing to step 6:
When dividing 107 by 171, we get 0 with a remainder of 107.
The number 0 becomes the next digit in our result. 
Result so far: 4510.0
Subtract 0 from 107 to get 107.
Bring next digit (8) of the dividend behind the 107 and repeat the process: 1078 / 171

Advancing to step 7:
If we divide 1078 by 171, we get 6 and a remainder of 52.
The next digit of our result is 6. 
Result so far: 45106.0
If we subtract 1026 from 1078, we get 52.
Include the next digit (0) from the dividend after 52, then repeat: 520 / 171

Moving on to step 8:
If we divide 520 by 171, we get 3 and a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 451063.0
If we take 513 away from 520, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 9:
70 divided by 171 is 0 with a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 451063.0
If we subtract 0 from 70, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 10:
The number 171 fits into 700 4 times, leaving a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 451063.04
If we take 684 away from 700, 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.

Going ahead to step 11:
160 divided by 171 is 0 with a remainder of 160.
Put 0 as the next digit of the answer. 
Result so far: 451063.04
Deduct 0 from 160 and we're left with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 12:
171 goes into 1600 9 times with a remainder of 61.
Put 9 as the next digit of the answer. 
Result so far: 451063.0409
If we take 1539 away from 1600, we end up with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Moving on to step 13:
The number 171 fits into 610 3 times, leaving a remainder of 97.
Record the quotient 3 as the next digit in the result. 
Result so far: 451063.04093
Subtracting 513 from 610 leaves us with 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Let's proceed to step 14:
970 divided by 171 is 5 with a remainder of 115.
Put 5 as the next digit of the answer. 
Result so far: 451063.040935
Subtract 855 from 970 to get 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Moving on to step 15:
171 goes into 1150 6 times with a remainder of 124.
The number 6 becomes the next digit in our result. 
Result so far: 451063.0409356
The remainder is 124 after subtracting 1026 from 1150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

On to step 16:
171 goes into 1240 7 times with a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 451063.04093567
Subtract 1197 from 1240 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

After the division, we end up with 451063.04093567 and a remainder of 4.3e-08.