We're dividing 766421 by 4 
Let's see how many times 4 fits into 766421.

Step 1:
The number 4 fits into 7 1 times, leaving a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 4 from 7 to get 3.
Include the next digit (6) from the dividend after 3, then repeat: 36 / 4

Advancing to step 2:
When dividing 36 by 4, we get 9 with a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 19.0
Subtract 36 from 36 to get 0.
Fetch the next digit (6) from the dividend, attach it to 0 and continue: 6 / 4

Going ahead to step 3:
If we divide 6 by 4, we get 1 and a remainder of 2.
The next digit of our result is 1. 
Result so far: 191.0
The remainder is 2 after subtracting 4 from 6.
Bring next digit (4) of the dividend behind the 2 and repeat the process: 24 / 4

Step 4:
4 goes into 24 6 times with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 1916.0
If we subtract 24 from 24, we get 0.
Take the next digit (2) from the dividend and append it to 0, then repeat: 2 / 4

Step 5:
2 divided by 4 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 19160.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 4

Moving on to step 6:
When dividing 21 by 4, we get 5 with a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 191605.0
Deduct 20 from 21 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 7:
The number 4 fits into 10 2 times, leaving a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 191605.2
Subtract 8 from 10 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 8:
4 goes into 20 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 191605.25
The remainder is 0 after subtracting 20 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
When dividing 0 by 4, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 191605.25
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
If we divide 0 by 4, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 191605.25
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 191605.25 with a remainder of 0.0.