We're dividing 139633 by 90 
We want to figure out the number of times 139633 can be divided by 90.

Step 1:
If we divide 1 by 90, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 90

On to step 2:
13 divided by 90 is 0 with a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 13, we end up with 13.
Include the next digit (9) from the dividend after 13, then repeat: 139 / 90

Advancing to step 3:
90 can be fit into 139 1 times, resulting in a remainder of 49.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 90 from 139 to get 49.
Include the next digit (6) from the dividend after 49, then repeat: 496 / 90

Let's proceed to step 4:
90 goes into 496 5 times with a remainder of 46.
Write down 5 as next digit of the result. 
Result so far: 15.0
If we take 450 away from 496, we end up with 46.
Take the next digit (3) from the dividend and append it to 46, then repeat: 463 / 90

Moving on to step 5:
90 goes into 463 5 times with a remainder of 13.
The number 5 becomes the next digit in our result. 
Result so far: 155.0
If we subtract 450 from 463, we get 13.
Append the next digit (3) from the dividend to 13 and continue with: 133 / 90

Going ahead to step 6:
90 goes into 133 1 times with a remainder of 43.
The number 1 becomes the next digit in our result. 
Result so far: 1551.0
The remainder is 43 after subtracting 90 from 133.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 7:
90 can be fit into 430 4 times, resulting in a remainder of 70.
The next digit of our result is 4. 
Result so far: 1551.4
Subtract 360 from 430 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 8:
The number 90 fits into 700 7 times, leaving a remainder of 70.
The number 7 becomes the next digit in our result. 
Result so far: 1551.47
If we subtract 630 from 700, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 9:
If we divide 700 by 90, we get 7 and a remainder of 70.
Put 7 as the next digit of the answer. 
Result so far: 1551.477
Subtracting 630 from 700 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

After the division, we end up with 1551.477 and a remainder of 0.007.