78166511 divided by 422 
Our goal is to divide 78166511 by 422.

Let's proceed to step 1:
When dividing 7 by 422, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 422

On to step 2:
The number 422 fits into 78 0 times, leaving a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Append the next digit (1) from the dividend to 78 and continue with: 781 / 422

Step 3:
422 can be fit into 781 1 times, resulting in a remainder of 359.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 422 from 781 to get 359.
Append the next digit (6) from the dividend to 359 and continue with: 3596 / 422

Let's proceed to step 4:
If we divide 3596 by 422, we get 8 and a remainder of 220.
Use 8 as the next digit of our solution. 
Result so far: 18.0
Subtracting 3376 from 3596 leaves us with 220.
Append the next digit (6) from the dividend to 220 and continue with: 2206 / 422

Advancing to step 5:
The number 422 fits into 2206 5 times, leaving a remainder of 96.
Write down 5 as next digit of the result. 
Result so far: 185.0
Deduct 2110 from 2206 and we're left with 96.
Fetch the next digit (5) from the dividend, attach it to 96 and continue: 965 / 422

Moving on to step 6:
When dividing 965 by 422, we get 2 with a remainder of 121.
The number 2 becomes the next digit in our result. 
Result so far: 1852.0
Deduct 844 from 965 and we're left with 121.
Bring next digit (1) of the dividend behind the 121 and repeat the process: 1211 / 422

Let's proceed to step 7:
If we divide 1211 by 422, we get 2 and a remainder of 367.
Use 2 as the next digit of our solution. 
Result so far: 18522.0
If we take 844 away from 1211, we end up with 367.
Include the next digit (1) from the dividend after 367, then repeat: 3671 / 422

On to step 8:
If we divide 3671 by 422, we get 8 and a remainder of 295.
Put 8 as the next digit of the answer. 
Result so far: 185228.0
Deduct 3376 from 3671 and we're left with 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

Moving on to step 9:
If we divide 2950 by 422, we get 6 and a remainder of 418.
Record the quotient 6 as the next digit in the result. 
Result so far: 185228.6
Deduct 2532 from 2950 and we're left with 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

On to step 10:
4180 divided by 422 is 9 with a remainder of 382.
Put 9 as the next digit of the answer. 
Result so far: 185228.69
Subtracting 3798 from 4180 leaves us with 382.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3820, and continue the process.

Going ahead to step 11:
3820 divided by 422 is 9 with a remainder of 22.
Put 9 as the next digit of the answer. 
Result so far: 185228.699
Subtract 3798 from 3820 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

The final result is 185228.699 with a remainder of 0.0022.