We look at the division of 78800403 by 166 
Our goal is to divide 78800403 by 166.

On to step 1:
When dividing 7 by 166, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 166

Going ahead to step 2:
The number 166 fits into 78 0 times, leaving a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 78 after subtracting 0 from 78.
Bring next digit (8) of the dividend behind the 78 and repeat the process: 788 / 166

Moving on to step 3:
When dividing 788 by 166, we get 4 with a remainder of 124.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 664 from 788 leaves us with 124.
Bring next digit (0) of the dividend behind the 124 and repeat the process: 1240 / 166

On to step 4:
166 goes into 1240 7 times with a remainder of 78.
The next digit of our result is 7. 
Result so far: 47.0
Subtract 1162 from 1240 to get 78.
Bring next digit (0) of the dividend behind the 78 and repeat the process: 780 / 166

Moving on to step 5:
The number 166 fits into 780 4 times, leaving a remainder of 116.
The next digit of our result is 4. 
Result so far: 474.0
If we subtract 664 from 780, we get 116.
Grab the next digit (4) from the dividend, add it to 116, then carry on: 1164 / 166

Let's proceed to step 6:
When dividing 1164 by 166, we get 7 with a remainder of 2.
Use 7 as the next digit of our solution. 
Result so far: 4747.0
Subtract 1162 from 1164 to get 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 166

Step 7:
If we divide 20 by 166, we get 0 and a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 47470.0
If we take 0 away from 20, we end up with 20.
Include the next digit (3) from the dividend after 20, then repeat: 203 / 166

On to step 8:
If we divide 203 by 166, we get 1 and a remainder of 37.
Use 1 as the next digit of our solution. 
Result so far: 474701.0
If we subtract 166 from 203, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 9:
166 goes into 370 2 times with a remainder of 38.
The next digit of our result is 2. 
Result so far: 474701.2
Subtracting 332 from 370 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 10:
When dividing 380 by 166, we get 2 with a remainder of 48.
Record the quotient 2 as the next digit in the result. 
Result so far: 474701.22
Deduct 332 from 380 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final result is 474701.22 with a remainder of 0.048.