142390 ÷ 33 
We want to figure out the number of times 142390 can be divided by 33.

Advancing to step 1:
If we divide 1 by 33, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 33

On to step 2:
14 divided by 33 is 0 with a remainder of 14.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 14 leaves us with 14.
Take the next digit (2) from the dividend and append it to 14, then repeat: 142 / 33

Advancing to step 3:
The number 33 fits into 142 4 times, leaving a remainder of 10.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we subtract 132 from 142, we get 10.
Fetch the next digit (3) from the dividend, attach it to 10 and continue: 103 / 33

Step 4:
103 divided by 33 is 3 with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 43.0
Subtract 99 from 103 to get 4.
Grab the next digit (9) from the dividend, add it to 4, then carry on: 49 / 33

Moving on to step 5:
49 divided by 33 is 1 with a remainder of 16.
Record the quotient 1 as the next digit in the result. 
Result so far: 431.0
If we subtract 33 from 49, we get 16.
Include the next digit (0) from the dividend after 16, then repeat: 160 / 33

Advancing to step 6:
160 divided by 33 is 4 with a remainder of 28.
Put 4 as the next digit of the answer. 
Result so far: 4314.0
If we subtract 132 from 160, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 7:
33 goes into 280 8 times with a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 4314.8
If we subtract 264 from 280, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 8:
If we divide 160 by 33, we get 4 and a remainder of 28.
Put 4 as the next digit of the answer. 
Result so far: 4314.84
The remainder is 28 after subtracting 132 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 9:
The number 33 fits into 280 8 times, leaving a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 4314.848
Subtracting 264 from 280 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 10:
The number 33 fits into 160 4 times, leaving a remainder of 28.
Put 4 as the next digit of the answer. 
Result so far: 4314.8484
The remainder is 28 after subtracting 132 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 11:
When dividing 280 by 33, we get 8 with a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 4314.84848
Subtracting 264 from 280 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 12:
If we divide 160 by 33, we get 4 and a remainder of 28.
Put 4 as the next digit of the answer. 
Result so far: 4314.848484
If we subtract 132 from 160, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 13:
33 goes into 280 8 times with a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 4314.8484848
Deduct 264 from 280 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 14:
The number 33 fits into 160 4 times, leaving a remainder of 28.
The number 4 becomes the next digit in our result. 
Result so far: 4314.84848484
If we subtract 132 from 160, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

The final outcome is 4314.84848484, with a leftover of 2.8e-08.