We're dividing 158570 by 90 
We want to divide 158570 by 90.

Step 1:
The number 90 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 90

Going ahead to step 2:
15 divided by 90 is 0 with a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 15 after subtracting 0 from 15.
Append the next digit (8) from the dividend to 15 and continue with: 158 / 90

Moving on to step 3:
If we divide 158 by 90, we get 1 and a remainder of 68.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 90 away from 158, we end up with 68.
Bring next digit (5) of the dividend behind the 68 and repeat the process: 685 / 90

Step 4:
90 goes into 685 7 times with a remainder of 55.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
Subtract 630 from 685 to get 55.
Append the next digit (7) from the dividend to 55 and continue with: 557 / 90

Going ahead to step 5:
90 goes into 557 6 times with a remainder of 17.
Use 6 as the next digit of our solution. 
Result so far: 176.0
Subtracting 540 from 557 leaves us with 17.
Take the next digit (0) from the dividend and append it to 17, then repeat: 170 / 90

On to step 6:
90 can be fit into 170 1 times, resulting in a remainder of 80.
Record the quotient 1 as the next digit in the result. 
Result so far: 1761.0
If we subtract 90 from 170, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 7:
90 goes into 800 8 times with a remainder of 80.
Put 8 as the next digit of the answer. 
Result so far: 1761.8
Deduct 720 from 800 and we're left 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.

Advancing to step 8:
90 goes into 800 8 times with a remainder of 80.
Write down 8 as next digit of the result. 
Result so far: 1761.88
Deduct 720 from 800 and we're left 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.

After the division, we end up with 1761.88 and a remainder of 0.08.