77406638 ÷ 397 
Our goal is to divide 77406638 by 397.

On to step 1:
7 divided by 397 is 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Bring next digit (7) of the dividend behind the 7 and repeat the process: 77 / 397

Moving on to step 2:
If we divide 77 by 397, we get 0 and a remainder of 77.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 77, we get 77.
Grab the next digit (4) from the dividend, add it to 77, then carry on: 774 / 397

Going ahead to step 3:
397 can be fit into 774 1 times, resulting in a remainder of 377.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 397 from 774 to get 377.
Bring next digit (0) of the dividend behind the 377 and repeat the process: 3770 / 397

On to step 4:
When dividing 3770 by 397, we get 9 with a remainder of 197.
Use 9 as the next digit of our solution. 
Result so far: 19.0
The remainder is 197 after subtracting 3573 from 3770.
Fetch the next digit (6) from the dividend, attach it to 197 and continue: 1976 / 397

Advancing to step 5:
If we divide 1976 by 397, we get 4 and a remainder of 388.
The number 4 becomes the next digit in our result. 
Result so far: 194.0
Subtract 1588 from 1976 to get 388.
Fetch the next digit (6) from the dividend, attach it to 388 and continue: 3886 / 397

Going ahead to step 6:
397 goes into 3886 9 times with a remainder of 313.
Put 9 as the next digit of the answer. 
Result so far: 1949.0
If we take 3573 away from 3886, we end up with 313.
Grab the next digit (3) from the dividend, add it to 313, then carry on: 3133 / 397

Going ahead to step 7:
When dividing 3133 by 397, we get 7 with a remainder of 354.
The next digit of our result is 7. 
Result so far: 19497.0
Subtract 2779 from 3133 to get 354.
Take the next digit (8) from the dividend and append it to 354, then repeat: 3548 / 397

Moving on to step 8:
When dividing 3548 by 397, we get 8 with a remainder of 372.
Record the quotient 8 as the next digit in the result. 
Result so far: 194978.0
Subtract 3176 from 3548 to get 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Moving on to step 9:
3720 divided by 397 is 9 with a remainder of 147.
Record the quotient 9 as the next digit in the result. 
Result so far: 194978.9
Deduct 3573 from 3720 and we're left with 147.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

On to step 10:
397 can be fit into 1470 3 times, resulting in a remainder of 279.
The next digit of our result is 3. 
Result so far: 194978.93
Deduct 1191 from 1470 and we're left with 279.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2790, and continue the process.

Let's proceed to step 11:
2790 divided by 397 is 7 with a remainder of 11.
The next digit of our result is 7. 
Result so far: 194978.937
If we take 2779 away from 2790, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 12:
397 can be fit into 110 0 times, resulting in a remainder of 110.
Record the quotient 0 as the next digit in the result. 
Result so far: 194978.937
Subtracting 0 from 110 leaves us with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Let's proceed to step 13:
When dividing 1100 by 397, we get 2 with a remainder of 306.
Record the quotient 2 as the next digit in the result. 
Result so far: 194978.93702
If we take 794 away from 1100, we end up with 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

Going ahead to step 14:
397 can be fit into 3060 7 times, resulting in a remainder of 281.
The next digit of our result is 7. 
Result so far: 194978.937027
Subtracting 2779 from 3060 leaves us with 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

Moving on to step 15:
397 can be fit into 2810 7 times, resulting in a remainder of 31.
Write down 7 as next digit of the result. 
Result so far: 194978.9370277
Subtract 2779 from 2810 to get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

In conclusion, the division gives 194978.9370277 with a balance of 3.1e-07.