Let's divide 389721 by 77
We want to figure out the number of times 389721 can be divided by 77.

Advancing to step 1:
77 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 77

Step 2:
If we divide 38 by 77, we get 0 and a remainder of 38.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 38 to get 38.
Bring next digit (9) of the dividend behind the 38 and repeat the process: 389 / 77

Moving on to step 3:
If we divide 389 by 77, we get 5 and a remainder of 4.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
The remainder is 4 after subtracting 385 from 389.
Bring next digit (7) of the dividend behind the 4 and repeat the process: 47 / 77

Going ahead to step 4:
When dividing 47 by 77, we get 0 with a remainder of 47.
Use 0 as the next digit of our solution. 
Result so far: 50.0
The remainder is 47 after subtracting 0 from 47.
Append the next digit (2) from the dividend to 47 and continue with: 472 / 77

Moving on to step 5:
When dividing 472 by 77, we get 6 with a remainder of 10.
The next digit of our result is 6. 
Result so far: 506.0
Subtract 462 from 472 to get 10.
Include the next digit (1) from the dividend after 10, then repeat: 101 / 77

Let's proceed to step 6:
If we divide 101 by 77, we get 1 and a remainder of 24.
Use 1 as the next digit of our solution. 
Result so far: 5061.0
Subtract 77 from 101 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 7:
The number 77 fits into 240 3 times, leaving a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 5061.3
The remainder is 9 after subtracting 231 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 8:
77 can be fit into 90 1 times, resulting in a remainder of 13.
Use 1 as the next digit of our solution. 
Result so far: 5061.31
If we subtract 77 from 90, 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.

Step 9:
77 can be fit into 130 1 times, resulting in a remainder of 53.
The next digit of our result is 1. 
Result so far: 5061.311
If we subtract 77 from 130, we get 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

The final result is 5061.311 with a remainder of 0.0053.