We look at the division of 58580021 by 770 
Let's see how many times 770 fits into 58580021.

Going ahead to step 1:
770 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 770

Moving on to step 2:
770 can be fit into 58 0 times, resulting in a remainder of 58.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 58, we end up with 58.
Grab the next digit (5) from the dividend, add it to 58, then carry on: 585 / 770

Advancing to step 3:
When dividing 585 by 770, we get 0 with a remainder of 585.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 585 leaves us with 585.
Bring next digit (8) of the dividend behind the 585 and repeat the process: 5858 / 770

Advancing to step 4:
If we divide 5858 by 770, we get 7 and a remainder of 468.
The next digit of our result is 7. 
Result so far: 7.0
Deduct 5390 from 5858 and we're left with 468.
Bring next digit (0) of the dividend behind the 468 and repeat the process: 4680 / 770

On to step 5:
If we divide 4680 by 770, we get 6 and a remainder of 60.
Write down 6 as next digit of the result. 
Result so far: 76.0
If we subtract 4620 from 4680, we get 60.
Bring next digit (0) of the dividend behind the 60 and repeat the process: 600 / 770

Let's proceed to step 6:
The number 770 fits into 600 0 times, leaving a remainder of 600.
Put 0 as the next digit of the answer. 
Result so far: 760.0
If we take 0 away from 600, we end up with 600.
Include the next digit (2) from the dividend after 600, then repeat: 6002 / 770

On to step 7:
The number 770 fits into 6002 7 times, leaving a remainder of 612.
The next digit of our result is 7. 
Result so far: 7607.0
If we take 5390 away from 6002, we end up with 612.
Include the next digit (1) from the dividend after 612, then repeat: 6121 / 770

Advancing to step 8:
770 goes into 6121 7 times with a remainder of 731.
The number 7 becomes the next digit in our result. 
Result so far: 76077.0
If we subtract 5390 from 6121, we get 731.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7310, and continue the process.

Step 9:
If we divide 7310 by 770, we get 9 and a remainder of 380.
The number 9 becomes the next digit in our result. 
Result so far: 76077.9
If we subtract 6930 from 7310, we get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Moving on to step 10:
770 can be fit into 3800 4 times, resulting in a remainder of 720.
Write down 4 as next digit of the result. 
Result so far: 76077.94
The remainder is 720 after subtracting 3080 from 3800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

Moving on to step 11:
If we divide 7200 by 770, we get 9 and a remainder of 270.
Record the quotient 9 as the next digit in the result. 
Result so far: 76077.949
If we take 6930 away from 7200, we end up with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Moving on to step 12:
If we divide 2700 by 770, we get 3 and a remainder of 390.
Record the quotient 3 as the next digit in the result. 
Result so far: 76077.9493
If we take 2310 away from 2700, we end up with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

On to step 13:
770 goes into 3900 5 times with a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 76077.94935
Subtracting 3850 from 3900 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 14:
770 can be fit into 500 0 times, resulting in a remainder of 500.
Put 0 as the next digit of the answer. 
Result so far: 76077.94935
The remainder is 500 after subtracting 0 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Step 15:
If we divide 5000 by 770, we get 6 and a remainder of 380.
Write down 6 as next digit of the result. 
Result so far: 76077.9493506
Subtract 4620 from 5000 to get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Step 16:
The number 770 fits into 3800 4 times, leaving a remainder of 720.
Write down 4 as next digit of the result. 
Result so far: 76077.94935064
Subtract 3080 from 3800 to get 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

The final result is 76077.94935064 with a remainder of 7.2e-07.