30520381 ÷ 78 
Our goal is to divide 30520381 by 78.

On to step 1:
When dividing 3 by 78, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 78

Advancing to step 2:
When dividing 30 by 78, we get 0 with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 30 to get 30.
Append the next digit (5) from the dividend to 30 and continue with: 305 / 78

Step 3:
305 divided by 78 is 3 with a remainder of 71.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 71 after subtracting 234 from 305.
Grab the next digit (2) from the dividend, add it to 71, then carry on: 712 / 78

Moving on to step 4:
78 goes into 712 9 times with a remainder of 10.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
Deduct 702 from 712 and we're left with 10.
Bring next digit (0) of the dividend behind the 10 and repeat the process: 100 / 78

Let's proceed to step 5:
The number 78 fits into 100 1 times, leaving a remainder of 22.
Write down 1 as next digit of the result. 
Result so far: 391.0
If we subtract 78 from 100, we get 22.
Append the next digit (3) from the dividend to 22 and continue with: 223 / 78

Step 6:
When dividing 223 by 78, we get 2 with a remainder of 67.
Use 2 as the next digit of our solution. 
Result so far: 3912.0
Subtracting 156 from 223 leaves us with 67.
Bring next digit (8) of the dividend behind the 67 and repeat the process: 678 / 78

Let's proceed to step 7:
78 goes into 678 8 times with a remainder of 54.
The next digit of our result is 8. 
Result so far: 39128.0
If we take 624 away from 678, we end up with 54.
Bring next digit (1) of the dividend behind the 54 and repeat the process: 541 / 78

On to step 8:
78 can be fit into 541 6 times, resulting in a remainder of 73.
Record the quotient 6 as the next digit in the result. 
Result so far: 391286.0
The remainder is 73 after subtracting 468 from 541.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Going ahead to step 9:
The number 78 fits into 730 9 times, leaving a remainder of 28.
Use 9 as the next digit of our solution. 
Result so far: 391286.9
Subtract 702 from 730 to 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 10:
The number 78 fits into 280 3 times, leaving a remainder of 46.
Put 3 as the next digit of the answer. 
Result so far: 391286.93
Deduct 234 from 280 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 11:
When dividing 460 by 78, we get 5 with a remainder of 70.
Write down 5 as next digit of the result. 
Result so far: 391286.935
Subtracting 390 from 460 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 12:
78 goes into 700 8 times with a remainder of 76.
Put 8 as the next digit of the answer. 
Result so far: 391286.9358
The remainder is 76 after subtracting 624 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 13:
78 can be fit into 760 9 times, resulting in a remainder of 58.
Record the quotient 9 as the next digit in the result. 
Result so far: 391286.93589
Deduct 702 from 760 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 14:
78 goes into 580 7 times with a remainder of 34.
Write down 7 as next digit of the result. 
Result so far: 391286.935897
The remainder is 34 after subtracting 546 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 15:
78 goes into 340 4 times with a remainder of 28.
Use 4 as the next digit of our solution. 
Result so far: 391286.9358974
If we subtract 312 from 340, 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 16:
When dividing 280 by 78, we get 3 with a remainder of 46.
Put 3 as the next digit of the answer. 
Result so far: 391286.93589743
If we take 234 away from 280, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

After the division, we end up with 391286.93589743 and a remainder of 4.6e-08.