42499790 divided by 390 
We want to divide 42499790 by 390.

Advancing to step 1:
The number 390 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 390

On to step 2:
If we divide 42 by 390, we get 0 and a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Fetch the next digit (4) from the dividend, attach it to 42 and continue: 424 / 390

Step 3:
390 goes into 424 1 times with a remainder of 34.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 390 away from 424, we end up with 34.
Grab the next digit (9) from the dividend, add it to 34, then carry on: 349 / 390

Moving on to step 4:
If we divide 349 by 390, we get 0 and a remainder of 349.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we subtract 0 from 349, we get 349.
Bring next digit (9) of the dividend behind the 349 and repeat the process: 3499 / 390

Moving on to step 5:
The number 390 fits into 3499 8 times, leaving a remainder of 379.
Record the quotient 8 as the next digit in the result. 
Result so far: 108.0
Subtract 3120 from 3499 to get 379.
Bring next digit (7) of the dividend behind the 379 and repeat the process: 3797 / 390

On to step 6:
3797 divided by 390 is 9 with a remainder of 287.
Record the quotient 9 as the next digit in the result. 
Result so far: 1089.0
Subtracting 3510 from 3797 leaves us with 287.
Include the next digit (9) from the dividend after 287, then repeat: 2879 / 390

Let's proceed to step 7:
When dividing 2879 by 390, we get 7 with a remainder of 149.
Write down 7 as next digit of the result. 
Result so far: 10897.0
If we take 2730 away from 2879, we end up with 149.
Include the next digit (0) from the dividend after 149, then repeat: 1490 / 390

Moving on to step 8:
The number 390 fits into 1490 3 times, leaving a remainder of 320.
The next digit of our result is 3. 
Result so far: 108973.0
Subtract 1170 from 1490 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Going ahead to step 9:
390 goes into 3200 8 times with a remainder of 80.
The number 8 becomes the next digit in our result. 
Result so far: 108973.8
Subtract 3120 from 3200 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 10:
390 can be fit into 800 2 times, resulting in a remainder of 20.
The next digit of our result is 2. 
Result so far: 108973.82
Deduct 780 from 800 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 11:
If we divide 200 by 390, we get 0 and a remainder of 200.
The number 0 becomes the next digit in our result. 
Result so far: 108973.82
Subtract 0 from 200 to get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 12:
The number 390 fits into 2000 5 times, leaving a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 108973.8205
Deduct 1950 from 2000 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 13:
The number 390 fits into 500 1 times, leaving a remainder of 110.
The next digit of our result is 1. 
Result so far: 108973.82051
If we take 390 away from 500, we end up with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

On to step 14:
The number 390 fits into 1100 2 times, leaving a remainder of 320.
The number 2 becomes the next digit in our result. 
Result so far: 108973.820512
If we take 780 away from 1100, we end up with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Going ahead to step 15:
The number 390 fits into 3200 8 times, leaving a remainder of 80.
The number 8 becomes the next digit in our result. 
Result so far: 108973.8205128
If we subtract 3120 from 3200, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 16:
390 goes into 800 2 times with a remainder of 20.
The next digit of our result is 2. 
Result so far: 108973.82051282
Subtract 780 from 800 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.

The final result is 108973.82051282 with a remainder of 2e-08.