673841 divided by 90 
We're looking to find how many times 90 goes into 673841.

Let's proceed to step 1:
When dividing 6 by 90, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Include the next digit (7) from the dividend after 6, then repeat: 67 / 90

Step 2:
The number 90 fits into 67 0 times, leaving a remainder of 67.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 67, we get 67.
Bring next digit (3) of the dividend behind the 67 and repeat the process: 673 / 90

Step 3:
When dividing 673 by 90, we get 7 with a remainder of 43.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we subtract 630 from 673, we get 43.
Include the next digit (8) from the dividend after 43, then repeat: 438 / 90

On to step 4:
If we divide 438 by 90, we get 4 and a remainder of 78.
The next digit of our result is 4. 
Result so far: 74.0
The remainder is 78 after subtracting 360 from 438.
Append the next digit (4) from the dividend to 78 and continue with: 784 / 90

Moving on to step 5:
When dividing 784 by 90, we get 8 with a remainder of 64.
The next digit of our result is 8. 
Result so far: 748.0
Subtract 720 from 784 to get 64.
Grab the next digit (1) from the dividend, add it to 64, then carry on: 641 / 90

Moving on to step 6:
90 goes into 641 7 times with a remainder of 11.
The number 7 becomes the next digit in our result. 
Result so far: 7487.0
Deduct 630 from 641 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 7:
110 divided by 90 is 1 with a remainder of 20.
The next digit of our result is 1. 
Result so far: 7487.1
If we subtract 90 from 110, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 8:
If we divide 200 by 90, we get 2 and a remainder of 20.
Put 2 as the next digit of the answer. 
Result so far: 7487.12
Deduct 180 from 200 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
When dividing 200 by 90, we get 2 with a remainder of 20.
Put 2 as the next digit of the answer. 
Result so far: 7487.122
If we subtract 180 from 200, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 7487.122 with a remainder of 0.002.