Let's divide 603387 by 90
We're looking to find how many times 90 goes into 603387.

Moving on to step 1:
6 divided by 90 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 90

Advancing to step 2:
90 can be fit into 60 0 times, resulting in a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 60, we end up with 60.
Include the next digit (3) from the dividend after 60, then repeat: 603 / 90

Step 3:
If we divide 603 by 90, we get 6 and a remainder of 63.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we subtract 540 from 603, we get 63.
Include the next digit (3) from the dividend after 63, then repeat: 633 / 90

Step 4:
633 divided by 90 is 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 67.0
Deduct 630 from 633 and we're left with 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 90

Step 5:
When dividing 38 by 90, we get 0 with a remainder of 38.
Write down 0 as next digit of the result. 
Result so far: 670.0
The remainder is 38 after subtracting 0 from 38.
Grab the next digit (7) from the dividend, add it to 38, then carry on: 387 / 90

Moving on to step 6:
If we divide 387 by 90, we get 4 and a remainder of 27.
Record the quotient 4 as the next digit in the result. 
Result so far: 6704.0
If we subtract 360 from 387, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Moving on to step 7:
If we divide 270 by 90, we get 3 and a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 6704.3
Subtract 270 from 270 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
If we divide 0 by 90, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 6704.3
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
If we divide 0 by 90, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 6704.3
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 6704.3, with a leftover of 0.0.