We look at the division of 340212 by 90 
We want to divide 340212 by 90.

Going ahead to step 1:
When dividing 3 by 90, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 90

Advancing to step 2:
If we divide 34 by 90, we get 0 and a remainder of 34.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 34 after subtracting 0 from 34.
Fetch the next digit (0) from the dividend, attach it to 34 and continue: 340 / 90

Moving on to step 3:
When dividing 340 by 90, we get 3 with a remainder of 70.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 270 from 340 to get 70.
Fetch the next digit (2) from the dividend, attach it to 70 and continue: 702 / 90

Going ahead to step 4:
702 divided by 90 is 7 with a remainder of 72.
The next digit of our result is 7. 
Result so far: 37.0
If we subtract 630 from 702, we get 72.
Bring next digit (1) of the dividend behind the 72 and repeat the process: 721 / 90

Going ahead to step 5:
721 divided by 90 is 8 with a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 378.0
Subtracting 720 from 721 leaves us with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 90

Moving on to step 6:
When dividing 12 by 90, we get 0 with a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 3780.0
Deduct 0 from 12 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 7:
90 can be fit into 120 1 times, resulting in a remainder of 30.
Write down 1 as next digit of the result. 
Result so far: 3780.1
Deduct 90 from 120 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
90 goes into 300 3 times with a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 3780.13
Subtract 270 from 300 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 9:
The number 90 fits into 300 3 times, leaving a remainder of 30.
Use 3 as the next digit of our solution. 
Result so far: 3780.133
If we take 270 away from 300, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final outcome is 3780.133, with a leftover of 0.003.