86370904 ÷ 860 
We want to figure out the number of times 86370904 can be divided by 860.

Advancing to step 1:
If we divide 8 by 860, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 860

On to step 2:
860 goes into 86 0 times with a remainder of 86.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 86 to get 86.
Bring next digit (3) of the dividend behind the 86 and repeat the process: 863 / 860

Moving on to step 3:
When dividing 863 by 860, we get 1 with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 860 from 863 and we're left with 3.
Take the next digit (7) from the dividend and append it to 3, then repeat: 37 / 860

Going ahead to step 4:
If we divide 37 by 860, we get 0 and a remainder of 37.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we take 0 away from 37, we end up with 37.
Include the next digit (0) from the dividend after 37, then repeat: 370 / 860

Moving on to step 5:
370 divided by 860 is 0 with a remainder of 370.
Record the quotient 0 as the next digit in the result. 
Result so far: 100.0
Subtract 0 from 370 to get 370.
Fetch the next digit (9) from the dividend, attach it to 370 and continue: 3709 / 860

Let's proceed to step 6:
860 can be fit into 3709 4 times, resulting in a remainder of 269.
Put 4 as the next digit of the answer. 
Result so far: 1004.0
If we take 3440 away from 3709, we end up with 269.
Grab the next digit (0) from the dividend, add it to 269, then carry on: 2690 / 860

Let's proceed to step 7:
When dividing 2690 by 860, we get 3 with a remainder of 110.
Put 3 as the next digit of the answer. 
Result so far: 10043.0
If we take 2580 away from 2690, we end up with 110.
Fetch the next digit (4) from the dividend, attach it to 110 and continue: 1104 / 860

Step 8:
860 goes into 1104 1 times with a remainder of 244.
Write down 1 as next digit of the result. 
Result so far: 100431.0
The remainder is 244 after subtracting 860 from 1104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Going ahead to step 9:
If we divide 2440 by 860, we get 2 and a remainder of 720.
Write down 2 as next digit of the result. 
Result so far: 100431.2
Subtracting 1720 from 2440 leaves us with 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

Advancing to step 10:
If we divide 7200 by 860, we get 8 and a remainder of 320.
The number 8 becomes the next digit in our result. 
Result so far: 100431.28
If we subtract 6880 from 7200, we get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

On to step 11:
When dividing 3200 by 860, we get 3 with a remainder of 620.
The number 3 becomes the next digit in our result. 
Result so far: 100431.283
The remainder is 620 after subtracting 2580 from 3200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Step 12:
The number 860 fits into 6200 7 times, leaving a remainder of 180.
The number 7 becomes the next digit in our result. 
Result so far: 100431.2837
Subtracting 6020 from 6200 leaves us with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Step 13:
860 can be fit into 1800 2 times, resulting in a remainder of 80.
The next digit of our result is 2. 
Result so far: 100431.28372
Subtracting 1720 from 1800 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 14:
800 divided by 860 is 0 with a remainder of 800.
The next digit of our result is 0. 
Result so far: 100431.28372
If we take 0 away from 800, we end up with 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

Step 15:
When dividing 8000 by 860, we get 9 with a remainder of 260.
Put 9 as the next digit of the answer. 
Result so far: 100431.2837209
Deduct 7740 from 8000 and we're left with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Advancing to step 16:
2600 divided by 860 is 3 with a remainder of 20.
The number 3 becomes the next digit in our result. 
Result so far: 100431.28372093
If we take 2580 away from 2600, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 100431.28372093, with a leftover of 2e-08.