We're dividing 86158859 by 159 
We want to figure out the number of times 86158859 can be divided by 159.

Moving on to step 1:
When dividing 8 by 159, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 159

Step 2:
159 can be fit into 86 0 times, resulting in a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 86 after subtracting 0 from 86.
Include the next digit (1) from the dividend after 86, then repeat: 861 / 159

On to step 3:
159 can be fit into 861 5 times, resulting in a remainder of 66.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we subtract 795 from 861, we get 66.
Fetch the next digit (5) from the dividend, attach it to 66 and continue: 665 / 159

Step 4:
159 goes into 665 4 times with a remainder of 29.
Record the quotient 4 as the next digit in the result. 
Result so far: 54.0
Subtracting 636 from 665 leaves us with 29.
Grab the next digit (8) from the dividend, add it to 29, then carry on: 298 / 159

Going ahead to step 5:
159 goes into 298 1 times with a remainder of 139.
The next digit of our result is 1. 
Result so far: 541.0
Deduct 159 from 298 and we're left with 139.
Take the next digit (8) from the dividend and append it to 139, then repeat: 1398 / 159

Let's proceed to step 6:
The number 159 fits into 1398 8 times, leaving a remainder of 126.
Put 8 as the next digit of the answer. 
Result so far: 5418.0
If we take 1272 away from 1398, we end up with 126.
Take the next digit (5) from the dividend and append it to 126, then repeat: 1265 / 159

Let's proceed to step 7:
If we divide 1265 by 159, we get 7 and a remainder of 152.
Write down 7 as next digit of the result. 
Result so far: 54187.0
The remainder is 152 after subtracting 1113 from 1265.
Bring next digit (9) of the dividend behind the 152 and repeat the process: 1529 / 159

Let's proceed to step 8:
1529 divided by 159 is 9 with a remainder of 98.
Put 9 as the next digit of the answer. 
Result so far: 541879.0
If we take 1431 away from 1529, we end up with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Step 9:
The number 159 fits into 980 6 times, leaving a remainder of 26.
The next digit of our result is 6. 
Result so far: 541879.6
Subtract 954 from 980 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 10:
159 goes into 260 1 times with a remainder of 101.
Put 1 as the next digit of the answer. 
Result so far: 541879.61
If we subtract 159 from 260, we get 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

Let's proceed to step 11:
159 goes into 1010 6 times with a remainder of 56.
Put 6 as the next digit of the answer. 
Result so far: 541879.616
If we take 954 away from 1010, we end up with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Step 12:
560 divided by 159 is 3 with a remainder of 83.
Record the quotient 3 as the next digit in the result. 
Result so far: 541879.6163
The remainder is 83 after subtracting 477 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Step 13:
830 divided by 159 is 5 with a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 541879.61635
Subtract 795 from 830 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 14:
If we divide 350 by 159, we get 2 and a remainder of 32.
Put 2 as the next digit of the answer. 
Result so far: 541879.616352
If we subtract 318 from 350, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 15:
If we divide 320 by 159, we get 2 and a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 541879.6163522
Deduct 318 from 320 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final outcome is 541879.6163522, with a leftover of 2e-08.