Let's divide 77920173 by 31
We want to divide 77920173 by 31.

Let's proceed to step 1:
When dividing 7 by 31, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 31

On to step 2:
77 divided by 31 is 2 with a remainder of 15.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 62 from 77, we get 15.
Append the next digit (9) from the dividend to 15 and continue with: 159 / 31

Advancing to step 3:
31 can be fit into 159 5 times, resulting in a remainder of 4.
The next digit of our result is 5. 
Result so far: 25.0
Subtracting 155 from 159 leaves us with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 31

On to step 4:
The number 31 fits into 42 1 times, leaving a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 251.0
If we take 31 away from 42, we end up with 11.
Take the next digit (0) from the dividend and append it to 11, then repeat: 110 / 31

Moving on to step 5:
If we divide 110 by 31, we get 3 and a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 2513.0
Subtracting 93 from 110 leaves us with 17.
Append the next digit (1) from the dividend to 17 and continue with: 171 / 31

Step 6:
When dividing 171 by 31, we get 5 with a remainder of 16.
Use 5 as the next digit of our solution. 
Result so far: 25135.0
If we take 155 away from 171, we end up with 16.
Fetch the next digit (7) from the dividend, attach it to 16 and continue: 167 / 31

Moving on to step 7:
31 goes into 167 5 times with a remainder of 12.
Put 5 as the next digit of the answer. 
Result so far: 251355.0
The remainder is 12 after subtracting 155 from 167.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 31

Let's proceed to step 8:
123 divided by 31 is 3 with a remainder of 30.
The next digit of our result is 3. 
Result so far: 2513553.0
Subtracting 93 from 123 leaves us 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.

Step 9:
The number 31 fits into 300 9 times, leaving a remainder of 21.
Use 9 as the next digit of our solution. 
Result so far: 2513553.9
If we subtract 279 from 300, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 10:
If we divide 210 by 31, we get 6 and a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 2513553.96
Subtracting 186 from 210 leaves us 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.

On to step 11:
31 goes into 240 7 times with a remainder of 23.
Put 7 as the next digit of the answer. 
Result so far: 2513553.967
The remainder is 23 after subtracting 217 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 12:
If we divide 230 by 31, we get 7 and a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 2513553.9677
If we subtract 217 from 230, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Our division results in 2513553.9677 with a remaining 0.00013.