18720415 ÷ 168 
Our goal is to divide 18720415 by 168.

On to step 1:
1 divided by 168 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 168

Moving on to step 2:
When dividing 18 by 168, we get 0 with a remainder of 18.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 18 and we're left with 18.
Grab the next digit (7) from the dividend, add it to 18, then carry on: 187 / 168

Advancing to step 3:
If we divide 187 by 168, we get 1 and a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 19 after subtracting 168 from 187.
Grab the next digit (2) from the dividend, add it to 19, then carry on: 192 / 168

Step 4:
The number 168 fits into 192 1 times, leaving a remainder of 24.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
If we take 168 away from 192, we end up with 24.
Fetch the next digit (0) from the dividend, attach it to 24 and continue: 240 / 168

Step 5:
168 goes into 240 1 times with a remainder of 72.
Record the quotient 1 as the next digit in the result. 
Result so far: 111.0
The remainder is 72 after subtracting 168 from 240.
Include the next digit (4) from the dividend after 72, then repeat: 724 / 168

Advancing to step 6:
168 can be fit into 724 4 times, resulting in a remainder of 52.
Record the quotient 4 as the next digit in the result. 
Result so far: 1114.0
Deduct 672 from 724 and we're left with 52.
Grab the next digit (1) from the dividend, add it to 52, then carry on: 521 / 168

Moving on to step 7:
If we divide 521 by 168, we get 3 and a remainder of 17.
The next digit of our result is 3. 
Result so far: 11143.0
If we subtract 504 from 521, we get 17.
Fetch the next digit (5) from the dividend, attach it to 17 and continue: 175 / 168

On to step 8:
If we divide 175 by 168, we get 1 and a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 111431.0
Subtracting 168 from 175 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 9:
When dividing 70 by 168, we get 0 with a remainder of 70.
Write down 0 as next digit of the result. 
Result so far: 111431.0
Deduct 0 from 70 and we're left 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.

Moving on to step 10:
168 goes into 700 4 times with a remainder of 28.
Put 4 as the next digit of the answer. 
Result so far: 111431.04
Subtract 672 from 700 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.

Moving on to step 11:
The number 168 fits into 280 1 times, leaving a remainder of 112.
Put 1 as the next digit of the answer. 
Result so far: 111431.041
Subtract 168 from 280 to get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

On to step 12:
If we divide 1120 by 168, we get 6 and a remainder of 112.
Record the quotient 6 as the next digit in the result. 
Result so far: 111431.0416
Subtract 1008 from 1120 to get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Step 13:
168 goes into 1120 6 times with a remainder of 112.
The number 6 becomes the next digit in our result. 
Result so far: 111431.04166
If we take 1008 away from 1120, we end up with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

The final outcome is 111431.04166, with a leftover of 0.000112.