We divide 615380 by 90
Let's see how many times 90 fits into 615380.

Going ahead to step 1:
If we divide 6 by 90, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (1) from the dividend, attach it to 6 and continue: 61 / 90

Moving on to step 2:
If we divide 61 by 90, we get 0 and a remainder of 61.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 61 and we're left with 61.
Take the next digit (5) from the dividend and append it to 61, then repeat: 615 / 90

Step 3:
When dividing 615 by 90, we get 6 with a remainder of 75.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we take 540 away from 615, we end up with 75.
Fetch the next digit (3) from the dividend, attach it to 75 and continue: 753 / 90

Let's proceed to step 4:
If we divide 753 by 90, we get 8 and a remainder of 33.
The number 8 becomes the next digit in our result. 
Result so far: 68.0
If we take 720 away from 753, we end up with 33.
Fetch the next digit (8) from the dividend, attach it to 33 and continue: 338 / 90

Let's proceed to step 5:
90 can be fit into 338 3 times, resulting in a remainder of 68.
Put 3 as the next digit of the answer. 
Result so far: 683.0
The remainder is 68 after subtracting 270 from 338.
Bring next digit (0) of the dividend behind the 68 and repeat the process: 680 / 90

Step 6:
90 can be fit into 680 7 times, resulting in a remainder of 50.
The number 7 becomes the next digit in our result. 
Result so far: 6837.0
If we subtract 630 from 680, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 7:
90 can be fit into 500 5 times, resulting in a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 6837.5
The remainder is 50 after subtracting 450 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 8:
When dividing 500 by 90, we get 5 with a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 6837.55
Deduct 450 from 500 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final outcome is 6837.55, with a leftover of 0.05.