30987910 divided by 42 
Our goal is to divide 30987910 by 42.

Let's proceed to step 1:
3 divided by 42 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 42

Let's proceed to step 2:
The number 42 fits into 30 0 times, leaving a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 30, we get 30.
Take the next digit (9) from the dividend and append it to 30, then repeat: 309 / 42

Let's proceed to step 3:
309 divided by 42 is 7 with a remainder of 15.
The next digit of our result is 7. 
Result so far: 7.0
The remainder is 15 after subtracting 294 from 309.
Take the next digit (8) from the dividend and append it to 15, then repeat: 158 / 42

Step 4:
42 goes into 158 3 times with a remainder of 32.
The number 3 becomes the next digit in our result. 
Result so far: 73.0
If we take 126 away from 158, we end up with 32.
Take the next digit (7) from the dividend and append it to 32, then repeat: 327 / 42

Moving on to step 5:
42 can be fit into 327 7 times, resulting in a remainder of 33.
The number 7 becomes the next digit in our result. 
Result so far: 737.0
Deduct 294 from 327 and we're left with 33.
Append the next digit (9) from the dividend to 33 and continue with: 339 / 42

Going ahead to step 6:
42 goes into 339 8 times with a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 7378.0
Subtracting 336 from 339 leaves us with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 42

Let's proceed to step 7:
When dividing 31 by 42, we get 0 with a remainder of 31.
Use 0 as the next digit of our solution. 
Result so far: 73780.0
Subtracting 0 from 31 leaves us with 31.
Include the next digit (0) from the dividend after 31, then repeat: 310 / 42

Moving on to step 8:
The number 42 fits into 310 7 times, leaving a remainder of 16.
The next digit of our result is 7. 
Result so far: 737807.0
Subtract 294 from 310 to 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.

Going ahead to step 9:
If we divide 160 by 42, we get 3 and a remainder of 34.
The number 3 becomes the next digit in our result. 
Result so far: 737807.3
Deduct 126 from 160 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 10:
The number 42 fits into 340 8 times, leaving a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 737807.38
If we subtract 336 from 340, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 11:
If we divide 40 by 42, we get 0 and a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 737807.38
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 12:
42 can be fit into 400 9 times, resulting in a remainder of 22.
Write down 9 as next digit of the result. 
Result so far: 737807.3809
Deduct 378 from 400 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 13:
When dividing 220 by 42, we get 5 with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 737807.38095
If we subtract 210 from 220, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 14:
When dividing 100 by 42, we get 2 with a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 737807.380952
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 15:
The number 42 fits into 160 3 times, leaving a remainder of 34.
Record the quotient 3 as the next digit in the result. 
Result so far: 737807.3809523
If we subtract 126 from 160, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 16:
If we divide 340 by 42, we get 8 and a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 737807.38095238
Subtract 336 from 340 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final result is 737807.38095238 with a remainder of 4e-09.