Let's divide 12312620 by 770
We're looking to find how many times 770 goes into 12312620.

Going ahead to step 1:
When dividing 1 by 770, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 770

On to step 2:
The number 770 fits into 12 0 times, leaving a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Bring next digit (3) of the dividend behind the 12 and repeat the process: 123 / 770

Let's proceed to step 3:
770 can be fit into 123 0 times, resulting in a remainder of 123.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 123, we end up with 123.
Take the next digit (1) from the dividend and append it to 123, then repeat: 1231 / 770

Step 4:
1231 divided by 770 is 1 with a remainder of 461.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 770 from 1231, we get 461.
Include the next digit (2) from the dividend after 461, then repeat: 4612 / 770

Step 5:
770 can be fit into 4612 5 times, resulting in a remainder of 762.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Deduct 3850 from 4612 and we're left with 762.
Include the next digit (6) from the dividend after 762, then repeat: 7626 / 770

Let's proceed to step 6:
770 goes into 7626 9 times with a remainder of 696.
Put 9 as the next digit of the answer. 
Result so far: 159.0
If we subtract 6930 from 7626, we get 696.
Bring next digit (2) of the dividend behind the 696 and repeat the process: 6962 / 770

Step 7:
770 goes into 6962 9 times with a remainder of 32.
Record the quotient 9 as the next digit in the result. 
Result so far: 1599.0
The remainder is 32 after subtracting 6930 from 6962.
Grab the next digit (0) from the dividend, add it to 32, then carry on: 320 / 770

Advancing to step 8:
320 divided by 770 is 0 with a remainder of 320.
Write down 0 as next digit of the result. 
Result so far: 15990.0
If we take 0 away from 320, we end up with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 9:
When dividing 3200 by 770, we get 4 with a remainder of 120.
The next digit of our result is 4. 
Result so far: 15990.4
Deduct 3080 from 3200 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 10:
1200 divided by 770 is 1 with a remainder of 430.
The next digit of our result is 1. 
Result so far: 15990.41
Subtract 770 from 1200 to get 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

Step 11:
770 goes into 4300 5 times with a remainder of 450.
The number 5 becomes the next digit in our result. 
Result so far: 15990.415
Deduct 3850 from 4300 and we're left with 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Advancing to step 12:
When dividing 4500 by 770, we get 5 with a remainder of 650.
Record the quotient 5 as the next digit in the result. 
Result so far: 15990.4155
Subtract 3850 from 4500 to get 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6500, and continue the process.

After the division, we end up with 15990.4155 and a remainder of 0.0065.