We divide 77661970 by 400
Our goal is to divide 77661970 by 400.

Moving on to step 1:
400 can be fit into 7 0 times, resulting in a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (7) from the dividend to 7 and continue with: 77 / 400

Advancing to step 2:
If we divide 77 by 400, we get 0 and a remainder of 77.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 77 to get 77.
Include the next digit (6) from the dividend after 77, then repeat: 776 / 400

Step 3:
776 divided by 400 is 1 with a remainder of 376.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 400 from 776 to get 376.
Append the next digit (6) from the dividend to 376 and continue with: 3766 / 400

Let's proceed to step 4:
400 goes into 3766 9 times with a remainder of 166.
The next digit of our result is 9. 
Result so far: 19.0
If we take 3600 away from 3766, we end up with 166.
Include the next digit (1) from the dividend after 166, then repeat: 1661 / 400

Moving on to step 5:
1661 divided by 400 is 4 with a remainder of 61.
The number 4 becomes the next digit in our result. 
Result so far: 194.0
Subtracting 1600 from 1661 leaves us with 61.
Append the next digit (9) from the dividend to 61 and continue with: 619 / 400

Moving on to step 6:
400 goes into 619 1 times with a remainder of 219.
Write down 1 as next digit of the result. 
Result so far: 1941.0
Subtract 400 from 619 to get 219.
Take the next digit (7) from the dividend and append it to 219, then repeat: 2197 / 400

Going ahead to step 7:
The number 400 fits into 2197 5 times, leaving a remainder of 197.
Record the quotient 5 as the next digit in the result. 
Result so far: 19415.0
If we subtract 2000 from 2197, we get 197.
Append the next digit (0) from the dividend to 197 and continue with: 1970 / 400

Let's proceed to step 8:
When dividing 1970 by 400, we get 4 with a remainder of 370.
Put 4 as the next digit of the answer. 
Result so far: 194154.0
The remainder is 370 after subtracting 1600 from 1970.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Advancing to step 9:
3700 divided by 400 is 9 with a remainder of 100.
Use 9 as the next digit of our solution. 
Result so far: 194154.9
Deduct 3600 from 3700 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Advancing to step 10:
400 can be fit into 1000 2 times, resulting in a remainder of 200.
Write down 2 as next digit of the result. 
Result so far: 194154.92
Subtracting 800 from 1000 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 11:
When dividing 2000 by 400, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 194154.925
Subtract 2000 from 2000 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.

Moving on to step 12:
400 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 194154.925
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 13:
0 divided by 400 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 194154.925
The remainder is 0 after subtracting 0 from 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 194154.925 with a remainder of 0.0.