We're dividing 135951 by 87 
We're looking to find how many times 87 goes into 135951.

Moving on to step 1:
If we divide 1 by 87, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 87

Step 2:
87 can be fit into 13 0 times, resulting in a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Include the next digit (5) from the dividend after 13, then repeat: 135 / 87

Advancing to step 3:
87 can be fit into 135 1 times, resulting in a remainder of 48.
The next digit of our result is 1. 
Result so far: 1.0
If we take 87 away from 135, we end up with 48.
Take the next digit (9) from the dividend and append it to 48, then repeat: 489 / 87

Step 4:
When dividing 489 by 87, we get 5 with a remainder of 54.
Write down 5 as next digit of the result. 
Result so far: 15.0
The remainder is 54 after subtracting 435 from 489.
Append the next digit (5) from the dividend to 54 and continue with: 545 / 87

Moving on to step 5:
545 divided by 87 is 6 with a remainder of 23.
The number 6 becomes the next digit in our result. 
Result so far: 156.0
Subtracting 522 from 545 leaves us with 23.
Fetch the next digit (1) from the dividend, attach it to 23 and continue: 231 / 87

Advancing to step 6:
87 can be fit into 231 2 times, resulting in a remainder of 57.
Record the quotient 2 as the next digit in the result. 
Result so far: 1562.0
Subtract 174 from 231 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 7:
When dividing 570 by 87, we get 6 with a remainder of 48.
Record the quotient 6 as the next digit in the result. 
Result so far: 1562.6
Subtract 522 from 570 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 8:
The number 87 fits into 480 5 times, leaving a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 1562.65
Subtracting 435 from 480 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Moving on to step 9:
450 divided by 87 is 5 with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 1562.655
The remainder is 15 after subtracting 435 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final outcome is 1562.655, with a leftover of 0.0015.