83501578 ÷ 109 
We're looking to find how many times 109 goes into 83501578.

Let's proceed to step 1:
The number 109 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (3) from the dividend and append it to 8, then repeat: 83 / 109

Moving on to step 2:
109 can be fit into 83 0 times, resulting in a remainder of 83.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 83, we get 83.
Fetch the next digit (5) from the dividend, attach it to 83 and continue: 835 / 109

Let's proceed to step 3:
835 divided by 109 is 7 with a remainder of 72.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtracting 763 from 835 leaves us with 72.
Grab the next digit (0) from the dividend, add it to 72, then carry on: 720 / 109

Going ahead to step 4:
The number 109 fits into 720 6 times, leaving a remainder of 66.
Put 6 as the next digit of the answer. 
Result so far: 76.0
The remainder is 66 after subtracting 654 from 720.
Fetch the next digit (1) from the dividend, attach it to 66 and continue: 661 / 109

On to step 5:
661 divided by 109 is 6 with a remainder of 7.
The number 6 becomes the next digit in our result. 
Result so far: 766.0
The remainder is 7 after subtracting 654 from 661.
Grab the next digit (5) from the dividend, add it to 7, then carry on: 75 / 109

Going ahead to step 6:
When dividing 75 by 109, we get 0 with a remainder of 75.
Use 0 as the next digit of our solution. 
Result so far: 7660.0
If we take 0 away from 75, we end up with 75.
Grab the next digit (7) from the dividend, add it to 75, then carry on: 757 / 109

Advancing to step 7:
757 divided by 109 is 6 with a remainder of 103.
Use 6 as the next digit of our solution. 
Result so far: 76606.0
If we subtract 654 from 757, we get 103.
Include the next digit (8) from the dividend after 103, then repeat: 1038 / 109

Let's proceed to step 8:
109 goes into 1038 9 times with a remainder of 57.
Write down 9 as next digit of the result. 
Result so far: 766069.0
Subtract 981 from 1038 to get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Advancing to step 9:
When dividing 570 by 109, we get 5 with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 766069.5
If we subtract 545 from 570, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 10:
When dividing 250 by 109, we get 2 with a remainder of 32.
The next digit of our result is 2. 
Result so far: 766069.52
Subtracting 218 from 250 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 11:
The number 109 fits into 320 2 times, leaving a remainder of 102.
Write down 2 as next digit of the result. 
Result so far: 766069.522
Deduct 218 from 320 and we're left with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

The final outcome is 766069.522, with a leftover of 0.0102.