We look at the division of 77580516 by 449 
We want to divide 77580516 by 449.

Going ahead to step 1:
When dividing 7 by 449, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 449

Advancing to step 2:
The number 449 fits into 77 0 times, leaving a remainder of 77.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 77, we end up with 77.
Grab the next digit (5) from the dividend, add it to 77, then carry on: 775 / 449

Let's proceed to step 3:
If we divide 775 by 449, we get 1 and a remainder of 326.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 326 after subtracting 449 from 775.
Grab the next digit (8) from the dividend, add it to 326, then carry on: 3268 / 449

Going ahead to step 4:
3268 divided by 449 is 7 with a remainder of 125.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
Subtract 3143 from 3268 to get 125.
Take the next digit (0) from the dividend and append it to 125, then repeat: 1250 / 449

On to step 5:
If we divide 1250 by 449, we get 2 and a remainder of 352.
The next digit of our result is 2. 
Result so far: 172.0
Subtracting 898 from 1250 leaves us with 352.
Grab the next digit (5) from the dividend, add it to 352, then carry on: 3525 / 449

Step 6:
When dividing 3525 by 449, we get 7 with a remainder of 382.
Put 7 as the next digit of the answer. 
Result so far: 1727.0
If we subtract 3143 from 3525, we get 382.
Fetch the next digit (1) from the dividend, attach it to 382 and continue: 3821 / 449

On to step 7:
3821 divided by 449 is 8 with a remainder of 229.
Use 8 as the next digit of our solution. 
Result so far: 17278.0
Deduct 3592 from 3821 and we're left with 229.
Fetch the next digit (6) from the dividend, attach it to 229 and continue: 2296 / 449

Moving on to step 8:
The number 449 fits into 2296 5 times, leaving a remainder of 51.
Write down 5 as next digit of the result. 
Result so far: 172785.0
If we subtract 2245 from 2296, we get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Step 9:
510 divided by 449 is 1 with a remainder of 61.
Use 1 as the next digit of our solution. 
Result so far: 172785.1
Subtracting 449 from 510 leaves us with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Advancing to step 10:
449 can be fit into 610 1 times, resulting in a remainder of 161.
The next digit of our result is 1. 
Result so far: 172785.11
The remainder is 161 after subtracting 449 from 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1610, and continue the process.

The final result is 172785.11 with a remainder of 0.161.