We divide 77721999 by 397
We want to divide 77721999 by 397.

Moving on to step 1:
397 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 397

On to step 2:
The number 397 fits into 77 0 times, leaving a remainder of 77.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 77 to get 77.
Grab the next digit (7) from the dividend, add it to 77, then carry on: 777 / 397

Going ahead to step 3:
777 divided by 397 is 1 with a remainder of 380.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 397 from 777, we get 380.
Append the next digit (2) from the dividend to 380 and continue with: 3802 / 397

Step 4:
The number 397 fits into 3802 9 times, leaving a remainder of 229.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
Subtracting 3573 from 3802 leaves us with 229.
Fetch the next digit (1) from the dividend, attach it to 229 and continue: 2291 / 397

Let's proceed to step 5:
The number 397 fits into 2291 5 times, leaving a remainder of 306.
Use 5 as the next digit of our solution. 
Result so far: 195.0
Subtract 1985 from 2291 to get 306.
Take the next digit (9) from the dividend and append it to 306, then repeat: 3069 / 397

Step 6:
If we divide 3069 by 397, we get 7 and a remainder of 290.
Put 7 as the next digit of the answer. 
Result so far: 1957.0
Subtract 2779 from 3069 to get 290.
Include the next digit (9) from the dividend after 290, then repeat: 2909 / 397

Moving on to step 7:
2909 divided by 397 is 7 with a remainder of 130.
Use 7 as the next digit of our solution. 
Result so far: 19577.0
Deduct 2779 from 2909 and we're left with 130.
Append the next digit (9) from the dividend to 130 and continue with: 1309 / 397

Let's proceed to step 8:
The number 397 fits into 1309 3 times, leaving a remainder of 118.
The next digit of our result is 3. 
Result so far: 195773.0
Deduct 1191 from 1309 and we're left with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Let's proceed to step 9:
397 goes into 1180 2 times with a remainder of 386.
The number 2 becomes the next digit in our result. 
Result so far: 195773.2
Subtract 794 from 1180 to get 386.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3860, and continue the process.

Going ahead to step 10:
The number 397 fits into 3860 9 times, leaving a remainder of 287.
The next digit of our result is 9. 
Result so far: 195773.29
If we subtract 3573 from 3860, we get 287.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2870, and continue the process.

Step 11:
The number 397 fits into 2870 7 times, leaving a remainder of 91.
Put 7 as the next digit of the answer. 
Result so far: 195773.297
If we take 2779 away from 2870, we end up with 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Let's proceed to step 12:
910 divided by 397 is 2 with a remainder of 116.
Write down 2 as next digit of the result. 
Result so far: 195773.2972
Deduct 794 from 910 and we're left with 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Step 13:
397 can be fit into 1160 2 times, resulting in a remainder of 366.
The next digit of our result is 2. 
Result so far: 195773.29722
Subtract 794 from 1160 to get 366.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3660, and continue the process.

The quotient of the division is 195773.29722, and the remainder is 0.000366.