61438479 ÷ 80 
We want to divide 61438479 by 80.

Moving on to step 1:
If we divide 6 by 80, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Fetch the next digit (1) from the dividend, attach it to 6 and continue: 61 / 80

Moving on to step 2:
The number 80 fits into 61 0 times, leaving a remainder of 61.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 61 leaves us with 61.
Grab the next digit (4) from the dividend, add it to 61, then carry on: 614 / 80

Moving on to step 3:
614 divided by 80 is 7 with a remainder of 54.
Use 7 as the next digit of our solution. 
Result so far: 7.0
The remainder is 54 after subtracting 560 from 614.
Include the next digit (3) from the dividend after 54, then repeat: 543 / 80

Moving on to step 4:
When dividing 543 by 80, we get 6 with a remainder of 63.
Record the quotient 6 as the next digit in the result. 
Result so far: 76.0
The remainder is 63 after subtracting 480 from 543.
Bring next digit (8) of the dividend behind the 63 and repeat the process: 638 / 80

Moving on to step 5:
If we divide 638 by 80, we get 7 and a remainder of 78.
The next digit of our result is 7. 
Result so far: 767.0
If we subtract 560 from 638, we get 78.
Bring next digit (4) of the dividend behind the 78 and repeat the process: 784 / 80

On to step 6:
The number 80 fits into 784 9 times, leaving a remainder of 64.
Put 9 as the next digit of the answer. 
Result so far: 7679.0
The remainder is 64 after subtracting 720 from 784.
Fetch the next digit (7) from the dividend, attach it to 64 and continue: 647 / 80

On to step 7:
The number 80 fits into 647 8 times, leaving a remainder of 7.
Put 8 as the next digit of the answer. 
Result so far: 76798.0
Subtract 640 from 647 to get 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 80

Step 8:
The number 80 fits into 79 0 times, leaving a remainder of 79.
The number 0 becomes the next digit in our result. 
Result so far: 767980.0
If we subtract 0 from 79, we get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

On to step 9:
When dividing 790 by 80, we get 9 with a remainder of 70.
Put 9 as the next digit of the answer. 
Result so far: 767980.9
Subtracting 720 from 790 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 10:
If we divide 700 by 80, we get 8 and a remainder of 60.
The next digit of our result is 8. 
Result so far: 767980.98
The remainder is 60 after subtracting 640 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 11:
80 goes into 600 7 times with a remainder of 40.
Write down 7 as next digit of the result. 
Result so far: 767980.987
Subtract 560 from 600 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 12:
400 divided by 80 is 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 767980.9875
If we subtract 400 from 400, 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.

Moving on to step 13:
80 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 767980.9875
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.

Going ahead to step 14:
0 divided by 80 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 767980.9875
Deduct 0 from 0 and we're left 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.

Our division results in 767980.9875 with a remaining 0.0.