41391978 ÷ 811 
We're looking to find how many times 811 goes into 41391978.

Moving on to step 1:
The number 811 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 811

Going ahead to step 2:
811 can be fit into 41 0 times, resulting in a remainder of 41.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 41 after subtracting 0 from 41.
Take the next digit (3) from the dividend and append it to 41, then repeat: 413 / 811

Moving on to step 3:
When dividing 413 by 811, we get 0 with a remainder of 413.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 413, we get 413.
Fetch the next digit (9) from the dividend, attach it to 413 and continue: 4139 / 811

Going ahead to step 4:
If we divide 4139 by 811, we get 5 and a remainder of 84.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Subtract 4055 from 4139 to get 84.
Append the next digit (1) from the dividend to 84 and continue with: 841 / 811

Let's proceed to step 5:
841 divided by 811 is 1 with a remainder of 30.
The next digit of our result is 1. 
Result so far: 51.0
Subtract 811 from 841 to get 30.
Append the next digit (9) from the dividend to 30 and continue with: 309 / 811

On to step 6:
811 can be fit into 309 0 times, resulting in a remainder of 309.
Write down 0 as next digit of the result. 
Result so far: 510.0
Subtracting 0 from 309 leaves us with 309.
Take the next digit (7) from the dividend and append it to 309, then repeat: 3097 / 811

Let's proceed to step 7:
The number 811 fits into 3097 3 times, leaving a remainder of 664.
The number 3 becomes the next digit in our result. 
Result so far: 5103.0
The remainder is 664 after subtracting 2433 from 3097.
Take the next digit (8) from the dividend and append it to 664, then repeat: 6648 / 811

Step 8:
811 can be fit into 6648 8 times, resulting in a remainder of 160.
Write down 8 as next digit of the result. 
Result so far: 51038.0
Subtract 6488 from 6648 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 9:
811 can be fit into 1600 1 times, resulting in a remainder of 789.
Record the quotient 1 as the next digit in the result. 
Result so far: 51038.1
Subtracting 811 from 1600 leaves us with 789.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7890, and continue the process.

Step 10:
811 goes into 7890 9 times with a remainder of 591.
The number 9 becomes the next digit in our result. 
Result so far: 51038.19
Subtracting 7299 from 7890 leaves us with 591.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5910, and continue the process.

Let's proceed to step 11:
811 can be fit into 5910 7 times, resulting in a remainder of 233.
The number 7 becomes the next digit in our result. 
Result so far: 51038.197
Subtract 5677 from 5910 to get 233.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

On to step 12:
If we divide 2330 by 811, we get 2 and a remainder of 708.
Write down 2 as next digit of the result. 
Result so far: 51038.1972
If we take 1622 away from 2330, we end up with 708.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7080, and continue the process.

Step 13:
811 can be fit into 7080 8 times, resulting in a remainder of 592.
Use 8 as the next digit of our solution. 
Result so far: 51038.19728
If we take 6488 away from 7080, we end up with 592.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5920, and continue the process.

Step 14:
When dividing 5920 by 811, we get 7 with a remainder of 243.
Put 7 as the next digit of the answer. 
Result so far: 51038.197287
Deduct 5677 from 5920 and we're left with 243.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2430, and continue the process.

Advancing to step 15:
The number 811 fits into 2430 2 times, leaving a remainder of 808.
The number 2 becomes the next digit in our result. 
Result so far: 51038.1972872
Deduct 1622 from 2430 and we're left with 808.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8080, and continue the process.

Going ahead to step 16:
811 can be fit into 8080 9 times, resulting in a remainder of 781.
The number 9 becomes the next digit in our result. 
Result so far: 51038.19728729
The remainder is 781 after subtracting 7299 from 8080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7810, and continue the process.

The final outcome is 51038.19728729, with a leftover of 7.81e-07.