138913 divided by 90 
Let's see how many times 90 fits into 138913.

Going ahead to 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
Deduct 0 from 1 and we're left with 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 90

Step 2:
When dividing 13 by 90, we get 0 with a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 13, we get 13.
Append the next digit (8) from the dividend to 13 and continue with: 138 / 90

Going ahead to step 3:
90 can be fit into 138 1 times, resulting in a remainder of 48.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 90 from 138 leaves us with 48.
Grab the next digit (9) from the dividend, add it to 48, then carry on: 489 / 90

Step 4:
90 goes into 489 5 times with a remainder of 39.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
If we subtract 450 from 489, we get 39.
Bring next digit (1) of the dividend behind the 39 and repeat the process: 391 / 90

On to step 5:
If we divide 391 by 90, we get 4 and a remainder of 31.
Use 4 as the next digit of our solution. 
Result so far: 154.0
Subtracting 360 from 391 leaves us with 31.
Grab the next digit (3) from the dividend, add it to 31, then carry on: 313 / 90

Step 6:
If we divide 313 by 90, we get 3 and a remainder of 43.
The number 3 becomes the next digit in our result. 
Result so far: 1543.0
If we subtract 270 from 313, we get 43.
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:
The number 90 fits into 430 4 times, leaving a remainder of 70.
Put 4 as the next digit of the answer. 
Result so far: 1543.4
If we subtract 360 from 430, 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 8:
90 can be fit into 700 7 times, resulting in a remainder of 70.
The number 7 becomes the next digit in our result. 
Result so far: 1543.47
Subtract 630 from 700 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 9:
The number 90 fits into 700 7 times, leaving a remainder of 70.
Put 7 as the next digit of the answer. 
Result so far: 1543.477
Subtract 630 from 700 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.

Our division results in 1543.477 with a remaining 0.007.