340643 divided by 90 
We're looking to find how many times 90 goes into 340643.

Let's proceed to step 1:
If we divide 3 by 90, we get 0 and a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 90

Step 2:
If we divide 34 by 90, we get 0 and a remainder of 34.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 34 after subtracting 0 from 34.
Append the next digit (0) from the dividend to 34 and continue with: 340 / 90

Moving on to step 3:
If we divide 340 by 90, we get 3 and a remainder of 70.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we take 270 away from 340, we end up with 70.
Append the next digit (6) from the dividend to 70 and continue with: 706 / 90

Let's proceed to step 4:
If we divide 706 by 90, we get 7 and a remainder of 76.
Record the quotient 7 as the next digit in the result. 
Result so far: 37.0
Deduct 630 from 706 and we're left with 76.
Fetch the next digit (4) from the dividend, attach it to 76 and continue: 764 / 90

Moving on to step 5:
When dividing 764 by 90, we get 8 with a remainder of 44.
The number 8 becomes the next digit in our result. 
Result so far: 378.0
Subtract 720 from 764 to get 44.
Include the next digit (3) from the dividend after 44, then repeat: 443 / 90

Advancing to step 6:
443 divided by 90 is 4 with a remainder of 83.
Put 4 as the next digit of the answer. 
Result so far: 3784.0
Deduct 360 from 443 and we're left with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Going ahead to step 7:
If we divide 830 by 90, we get 9 and a remainder of 20.
The next digit of our result is 9. 
Result so far: 3784.9
Deduct 810 from 830 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 8:
200 divided by 90 is 2 with a remainder of 20.
Write down 2 as next digit of the result. 
Result so far: 3784.92
Subtract 180 from 200 to 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.

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: 3784.922
Subtract 180 from 200 to 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.

After the division, we end up with 3784.922 and a remainder of 0.002.