742391 ÷ 90 
We want to figure out the number of times 742391 can be divided by 90.

Advancing to step 1:
90 can be fit into 7 0 times, resulting in a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (4) from the dividend, attach it to 7 and continue: 74 / 90

Let's proceed to step 2:
74 divided by 90 is 0 with a remainder of 74.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 74 leaves us with 74.
Bring next digit (2) of the dividend behind the 74 and repeat the process: 742 / 90

Advancing to step 3:
The number 90 fits into 742 8 times, leaving a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtract 720 from 742 to get 22.
Grab the next digit (3) from the dividend, add it to 22, then carry on: 223 / 90

Moving on to step 4:
223 divided by 90 is 2 with a remainder of 43.
Use 2 as the next digit of our solution. 
Result so far: 82.0
If we take 180 away from 223, we end up with 43.
Grab the next digit (9) from the dividend, add it to 43, then carry on: 439 / 90

Advancing to step 5:
90 goes into 439 4 times with a remainder of 79.
The number 4 becomes the next digit in our result. 
Result so far: 824.0
If we take 360 away from 439, we end up with 79.
Fetch the next digit (1) from the dividend, attach it to 79 and continue: 791 / 90

Step 6:
90 goes into 791 8 times with a remainder of 71.
Record the quotient 8 as the next digit in the result. 
Result so far: 8248.0
Deduct 720 from 791 and we're left with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Advancing to step 7:
90 can be fit into 710 7 times, resulting in a remainder of 80.
The number 7 becomes the next digit in our result. 
Result so far: 8248.7
Deduct 630 from 710 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 8:
90 goes into 800 8 times with a remainder of 80.
Use 8 as the next digit of our solution. 
Result so far: 8248.78
Subtracting 720 from 800 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 9:
90 can be fit into 800 8 times, resulting in a remainder of 80.
The next digit of our result is 8. 
Result so far: 8248.788
If we take 720 away from 800, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

After the division, we end up with 8248.788 and a remainder of 0.008.