We divide 615021 by 90
Our goal is to divide 615021 by 90.

Let's proceed to step 1:
90 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (1) from the dividend and append it to 6, then repeat: 61 / 90

Going ahead to step 2:
If we divide 61 by 90, we get 0 and a remainder of 61.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 61, we end up with 61.
Fetch the next digit (5) from the dividend, attach it to 61 and continue: 615 / 90

Moving on to step 3:
If we divide 615 by 90, we get 6 and a remainder of 75.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtracting 540 from 615 leaves us with 75.
Grab the next digit (0) from the dividend, add it to 75, then carry on: 750 / 90

Moving on to step 4:
90 can be fit into 750 8 times, resulting in a remainder of 30.
Put 8 as the next digit of the answer. 
Result so far: 68.0
Subtract 720 from 750 to get 30.
Append the next digit (2) from the dividend to 30 and continue with: 302 / 90

Advancing to step 5:
When dividing 302 by 90, we get 3 with a remainder of 32.
Put 3 as the next digit of the answer. 
Result so far: 683.0
If we take 270 away from 302, we end up with 32.
Fetch the next digit (1) from the dividend, attach it to 32 and continue: 321 / 90

Let's proceed to step 6:
When dividing 321 by 90, we get 3 with a remainder of 51.
The next digit of our result is 3. 
Result so far: 6833.0
If we take 270 away from 321, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Advancing to step 7:
The number 90 fits into 510 5 times, leaving a remainder of 60.
Put 5 as the next digit of the answer. 
Result so far: 6833.5
Subtracting 450 from 510 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 8:
90 goes into 600 6 times with a remainder of 60.
Write down 6 as next digit of the result. 
Result so far: 6833.56
Deduct 540 from 600 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 9:
When dividing 600 by 90, we get 6 with a remainder of 60.
The number 6 becomes the next digit in our result. 
Result so far: 6833.566
Subtracting 540 from 600 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The final result is 6833.566 with a remainder of 0.006.