79015980 ÷ 770 
We want to divide 79015980 by 770.

Step 1:
The number 770 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Bring next digit (9) of the dividend behind the 7 and repeat the process: 79 / 770

On to step 2:
79 divided by 770 is 0 with a remainder of 79.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 79 leaves us with 79.
Take the next digit (0) from the dividend and append it to 79, then repeat: 790 / 770

Let's proceed to step 3:
The number 770 fits into 790 1 times, leaving a remainder of 20.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 20 after subtracting 770 from 790.
Take the next digit (1) from the dividend and append it to 20, then repeat: 201 / 770

Going ahead to step 4:
If we divide 201 by 770, we get 0 and a remainder of 201.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we subtract 0 from 201, we get 201.
Fetch the next digit (5) from the dividend, attach it to 201 and continue: 2015 / 770

Advancing to step 5:
2015 divided by 770 is 2 with a remainder of 475.
The number 2 becomes the next digit in our result. 
Result so far: 102.0
If we subtract 1540 from 2015, we get 475.
Bring next digit (9) of the dividend behind the 475 and repeat the process: 4759 / 770

Moving on to step 6:
If we divide 4759 by 770, we get 6 and a remainder of 139.
The next digit of our result is 6. 
Result so far: 1026.0
Deduct 4620 from 4759 and we're left with 139.
Bring next digit (8) of the dividend behind the 139 and repeat the process: 1398 / 770

On to step 7:
770 can be fit into 1398 1 times, resulting in a remainder of 628.
Record the quotient 1 as the next digit in the result. 
Result so far: 10261.0
The remainder is 628 after subtracting 770 from 1398.
Bring next digit (0) of the dividend behind the 628 and repeat the process: 6280 / 770

Going ahead to step 8:
770 goes into 6280 8 times with a remainder of 120.
Use 8 as the next digit of our solution. 
Result so far: 102618.0
If we take 6160 away from 6280, we end up 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.

On to step 9:
The number 770 fits into 1200 1 times, leaving a remainder of 430.
Write down 1 as next digit of the result. 
Result so far: 102618.1
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.

On to step 10:
4300 divided by 770 is 5 with a remainder of 450.
Use 5 as the next digit of our solution. 
Result so far: 102618.15
If we subtract 3850 from 4300, we get 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Moving on to step 11:
770 can be fit into 4500 5 times, resulting in a remainder of 650.
Put 5 as the next digit of the answer. 
Result so far: 102618.155
Subtracting 3850 from 4500 leaves us with 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6500, and continue the process.

The final outcome is 102618.155, with a leftover of 0.065.