5550391 divided by 90 
Let's see how many times 90 fits into 5550391.

Advancing to step 1:
90 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 90

Going ahead to step 2:
55 divided by 90 is 0 with a remainder of 55.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 55 leaves us with 55.
Grab the next digit (5) from the dividend, add it to 55, then carry on: 555 / 90

Step 3:
555 divided by 90 is 6 with a remainder of 15.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Deduct 540 from 555 and we're left with 15.
Take the next digit (0) from the dividend and append it to 15, then repeat: 150 / 90

Advancing to step 4:
When dividing 150 by 90, we get 1 with a remainder of 60.
The next digit of our result is 1. 
Result so far: 61.0
Deduct 90 from 150 and we're left with 60.
Include the next digit (3) from the dividend after 60, then repeat: 603 / 90

Going ahead to step 5:
The number 90 fits into 603 6 times, leaving a remainder of 63.
The next digit of our result is 6. 
Result so far: 616.0
Subtract 540 from 603 to get 63.
Fetch the next digit (9) from the dividend, attach it to 63 and continue: 639 / 90

Let's proceed to step 6:
639 divided by 90 is 7 with a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 6167.0
If we subtract 630 from 639, we get 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 90

Advancing to step 7:
If we divide 91 by 90, we get 1 and a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 61671.0
Subtracting 90 from 91 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 8:
If we divide 10 by 90, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 61671.0
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 9:
90 goes into 100 1 times with a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 61671.01
Subtracting 90 from 100 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 10:
The number 90 fits into 100 1 times, leaving a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 61671.011
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The quotient of the division is 61671.011, and the remainder is 0.001.