78242917 ÷ 18 
Let's see how many times 18 fits into 78242917.

Let's proceed to step 1:
7 divided by 18 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 18

Moving on to step 2:
18 can be fit into 78 4 times, resulting in a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtract 72 from 78 to get 6.
Fetch the next digit (2) from the dividend, attach it to 6 and continue: 62 / 18

Advancing to step 3:
18 can be fit into 62 3 times, resulting in a remainder of 8.
Write down 3 as next digit of the result. 
Result so far: 43.0
Subtracting 54 from 62 leaves us with 8.
Append the next digit (4) from the dividend to 8 and continue with: 84 / 18

Going ahead to step 4:
If we divide 84 by 18, we get 4 and a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 434.0
Subtract 72 from 84 to get 12.
Grab the next digit (2) from the dividend, add it to 12, then carry on: 122 / 18

On to step 5:
18 goes into 122 6 times with a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 4346.0
Subtracting 108 from 122 leaves us with 14.
Take the next digit (9) from the dividend and append it to 14, then repeat: 149 / 18

Step 6:
18 goes into 149 8 times with a remainder of 5.
The next digit of our result is 8. 
Result so far: 43468.0
If we subtract 144 from 149, we get 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 18

Moving on to step 7:
The number 18 fits into 51 2 times, leaving a remainder of 15.
The number 2 becomes the next digit in our result. 
Result so far: 434682.0
If we subtract 36 from 51, we get 15.
Fetch the next digit (7) from the dividend, attach it to 15 and continue: 157 / 18

Advancing to step 8:
157 divided by 18 is 8 with a remainder of 13.
The next digit of our result is 8. 
Result so far: 4346828.0
Subtract 144 from 157 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 9:
When dividing 130 by 18, we get 7 with a remainder of 4.
Write down 7 as next digit of the result. 
Result so far: 4346828.7
Deduct 126 from 130 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 10:
When dividing 40 by 18, we get 2 with a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 4346828.72
Deduct 36 from 40 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 11:
18 goes into 40 2 times with a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 4346828.722
Subtract 36 from 40 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.

After the division, we end up with 4346828.722 and a remainder of 0.0004.