We look at the division of 165811 by 378 
We're looking to find how many times 378 goes into 165811.

Advancing to step 1:
1 divided by 378 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.
Append the next digit (6) from the dividend to 1 and continue with: 16 / 378

Step 2:
16 divided by 378 is 0 with a remainder of 16.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 16 after subtracting 0 from 16.
Bring next digit (5) of the dividend behind the 16 and repeat the process: 165 / 378

On to step 3:
165 divided by 378 is 0 with a remainder of 165.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 165, we end up with 165.
Bring next digit (8) of the dividend behind the 165 and repeat the process: 1658 / 378

On to step 4:
The number 378 fits into 1658 4 times, leaving a remainder of 146.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 1512 from 1658 and we're left with 146.
Take the next digit (1) from the dividend and append it to 146, then repeat: 1461 / 378

Step 5:
378 goes into 1461 3 times with a remainder of 327.
Record the quotient 3 as the next digit in the result. 
Result so far: 43.0
Subtracting 1134 from 1461 leaves us with 327.
Grab the next digit (1) from the dividend, add it to 327, then carry on: 3271 / 378

Going ahead to step 6:
If we divide 3271 by 378, we get 8 and a remainder of 247.
The next digit of our result is 8. 
Result so far: 438.0
If we subtract 3024 from 3271, we get 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

Advancing to step 7:
The number 378 fits into 2470 6 times, leaving a remainder of 202.
Write down 6 as next digit of the result. 
Result so far: 438.6
If we take 2268 away from 2470, we end up with 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

Let's proceed to step 8:
2020 divided by 378 is 5 with a remainder of 130.
Record the quotient 5 as the next digit in the result. 
Result so far: 438.65
Subtract 1890 from 2020 to get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Let's proceed to step 9:
378 goes into 1300 3 times with a remainder of 166.
The number 3 becomes the next digit in our result. 
Result so far: 438.653
Deduct 1134 from 1300 and we're left with 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

On to step 10:
If we divide 1660 by 378, we get 4 and a remainder of 148.
The number 4 becomes the next digit in our result. 
Result so far: 438.6534
Subtract 1512 from 1660 to get 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

On to step 11:
378 goes into 1480 3 times with a remainder of 346.
Put 3 as the next digit of the answer. 
Result so far: 438.65343
Subtract 1134 from 1480 to get 346.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

Step 12:
If we divide 3460 by 378, we get 9 and a remainder of 58.
Use 9 as the next digit of our solution. 
Result so far: 438.653439
Subtracting 3402 from 3460 leaves us 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.

Let's proceed to step 13:
The number 378 fits into 580 1 times, leaving a remainder of 202.
Use 1 as the next digit of our solution. 
Result so far: 438.6534391
Subtract 378 from 580 to get 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

Advancing to step 14:
2020 divided by 378 is 5 with a remainder of 130.
The next digit of our result is 5. 
Result so far: 438.65343915
If we take 1890 away from 2020, we end up with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

The final outcome is 438.65343915, with a leftover of 1.3e-07.