673159 divided by 90 
We want to figure out the number of times 673159 can be divided by 90.

Moving on 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
Subtracting 0 from 6 leaves us with 6.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 90

Step 2:
If we divide 67 by 90, we get 0 and a remainder of 67.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 67 leaves us with 67.
Include the next digit (3) from the dividend after 67, then repeat: 673 / 90

Advancing to step 3:
If we divide 673 by 90, we get 7 and a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Deduct 630 from 673 and we're left with 43.
Bring next digit (1) of the dividend behind the 43 and repeat the process: 431 / 90

Let's proceed to step 4:
90 goes into 431 4 times with a remainder of 71.
The next digit of our result is 4. 
Result so far: 74.0
Subtract 360 from 431 to get 71.
Grab the next digit (5) from the dividend, add it to 71, then carry on: 715 / 90

On to step 5:
When dividing 715 by 90, we get 7 with a remainder of 85.
Record the quotient 7 as the next digit in the result. 
Result so far: 747.0
Subtract 630 from 715 to get 85.
Bring next digit (9) of the dividend behind the 85 and repeat the process: 859 / 90

Step 6:
90 goes into 859 9 times with a remainder of 49.
The number 9 becomes the next digit in our result. 
Result so far: 7479.0
If we take 810 away from 859, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Let's proceed to step 7:
If we divide 490 by 90, we get 5 and a remainder of 40.
The next digit of our result is 5. 
Result so far: 7479.5
If we take 450 away from 490, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 8:
When dividing 400 by 90, we get 4 with a remainder of 40.
The next digit of our result is 4. 
Result so far: 7479.54
Deduct 360 from 400 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 9:
90 can be fit into 400 4 times, resulting in a remainder of 40.
Record the quotient 4 as the next digit in the result. 
Result so far: 7479.544
Deduct 360 from 400 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

After the division, we end up with 7479.544 and a remainder of 0.004.