75780434 ÷ 861 
We want to figure out the number of times 75780434 can be divided by 861.

Moving on to step 1:
The number 861 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Fetch the next digit (5) from the dividend, attach it to 7 and continue: 75 / 861

Step 2:
861 goes into 75 0 times with a remainder of 75.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 75 leaves us with 75.
Include the next digit (7) from the dividend after 75, then repeat: 757 / 861

Advancing to step 3:
The number 861 fits into 757 0 times, leaving a remainder of 757.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 757 after subtracting 0 from 757.
Include the next digit (8) from the dividend after 757, then repeat: 7578 / 861

Step 4:
The number 861 fits into 7578 8 times, leaving a remainder of 690.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Deduct 6888 from 7578 and we're left with 690.
Grab the next digit (0) from the dividend, add it to 690, then carry on: 6900 / 861

Advancing to step 5:
When dividing 6900 by 861, we get 8 with a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 88.0
The remainder is 12 after subtracting 6888 from 6900.
Bring next digit (4) of the dividend behind the 12 and repeat the process: 124 / 861

On to step 6:
861 goes into 124 0 times with a remainder of 124.
The next digit of our result is 0. 
Result so far: 880.0
The remainder is 124 after subtracting 0 from 124.
Include the next digit (3) from the dividend after 124, then repeat: 1243 / 861

Step 7:
861 can be fit into 1243 1 times, resulting in a remainder of 382.
Put 1 as the next digit of the answer. 
Result so far: 8801.0
Subtracting 861 from 1243 leaves us with 382.
Append the next digit (4) from the dividend to 382 and continue with: 3824 / 861

Let's proceed to step 8:
3824 divided by 861 is 4 with a remainder of 380.
The number 4 becomes the next digit in our result. 
Result so far: 88014.0
If we subtract 3444 from 3824, we get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

On to step 9:
861 goes into 3800 4 times with a remainder of 356.
Use 4 as the next digit of our solution. 
Result so far: 88014.4
If we subtract 3444 from 3800, we get 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

On to step 10:
When dividing 3560 by 861, we get 4 with a remainder of 116.
The next digit of our result is 4. 
Result so far: 88014.44
If we subtract 3444 from 3560, we get 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

The final result is 88014.44 with a remainder of 0.116.