We're dividing 66381704 by 770 
Our goal is to divide 66381704 by 770.

On to step 1:
770 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 770

On to step 2:
66 divided by 770 is 0 with a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Fetch the next digit (3) from the dividend, attach it to 66 and continue: 663 / 770

Let's proceed to step 3:
770 can be fit into 663 0 times, resulting in a remainder of 663.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 663 and we're left with 663.
Take the next digit (8) from the dividend and append it to 663, then repeat: 6638 / 770

Let's proceed to step 4:
If we divide 6638 by 770, we get 8 and a remainder of 478.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we subtract 6160 from 6638, we get 478.
Grab the next digit (1) from the dividend, add it to 478, then carry on: 4781 / 770

Advancing to step 5:
4781 divided by 770 is 6 with a remainder of 161.
Write down 6 as next digit of the result. 
Result so far: 86.0
Subtract 4620 from 4781 to get 161.
Take the next digit (7) from the dividend and append it to 161, then repeat: 1617 / 770

On to step 6:
1617 divided by 770 is 2 with a remainder of 77.
Use 2 as the next digit of our solution. 
Result so far: 862.0
Subtract 1540 from 1617 to get 77.
Include the next digit (0) from the dividend after 77, then repeat: 770 / 770

Advancing to step 7:
The number 770 fits into 770 1 times, leaving a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 8621.0
Subtracting 770 from 770 leaves us with 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 770

Moving on to step 8:
If we divide 4 by 770, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 86210.0
The remainder is 4 after subtracting 0 from 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 9:
When dividing 40 by 770, we get 0 with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 86210.0
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 10:
400 divided by 770 is 0 with a remainder of 400.
The next digit of our result is 0. 
Result so far: 86210.0
If we subtract 0 from 400, we get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final outcome is 86210.0, with a leftover of 0.4.