Let's divide 38151989 by 30
We want to figure out the number of times 38151989 can be divided by 30.

On to step 1:
If we divide 3 by 30, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 30

Let's proceed to step 2:
30 goes into 38 1 times with a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 30 away from 38, we end up with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 30

Step 3:
The number 30 fits into 81 2 times, leaving a remainder of 21.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Deduct 60 from 81 and we're left with 21.
Include the next digit (5) from the dividend after 21, then repeat: 215 / 30

Step 4:
The number 30 fits into 215 7 times, leaving a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 127.0
If we subtract 210 from 215, we get 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 30

Step 5:
The number 30 fits into 51 1 times, leaving a remainder of 21.
Use 1 as the next digit of our solution. 
Result so far: 1271.0
Subtract 30 from 51 to get 21.
Fetch the next digit (9) from the dividend, attach it to 21 and continue: 219 / 30

Let's proceed to step 6:
219 divided by 30 is 7 with a remainder of 9.
Use 7 as the next digit of our solution. 
Result so far: 12717.0
If we take 210 away from 219, we end up with 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 30

Let's proceed to step 7:
30 goes into 98 3 times with a remainder of 8.
Use 3 as the next digit of our solution. 
Result so far: 127173.0
Subtracting 90 from 98 leaves us with 8.
Fetch the next digit (9) from the dividend, attach it to 8 and continue: 89 / 30

Advancing to step 8:
When dividing 89 by 30, we get 2 with a remainder of 29.
Use 2 as the next digit of our solution. 
Result so far: 1271732.0
The remainder is 29 after subtracting 60 from 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 9:
30 goes into 290 9 times with a remainder of 20.
The next digit of our result is 9. 
Result so far: 1271732.9
The remainder is 20 after subtracting 270 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 10:
30 goes into 200 6 times with a remainder of 20.
Use 6 as the next digit of our solution. 
Result so far: 1271732.96
Subtracting 180 from 200 leaves us 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.

Advancing to step 11:
The number 30 fits into 200 6 times, leaving a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 1271732.966
If we take 180 away from 200, we end up 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.

The final outcome is 1271732.966, with a leftover of 0.002.