91945816 ÷ 578 
We want to figure out the number of times 91945816 can be divided by 578.

Step 1:
578 goes into 9 0 times with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 578

Advancing to step 2:
91 divided by 578 is 0 with a remainder of 91.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 91 and we're left with 91.
Fetch the next digit (9) from the dividend, attach it to 91 and continue: 919 / 578

Going ahead to step 3:
919 divided by 578 is 1 with a remainder of 341.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 578 from 919 and we're left with 341.
Bring next digit (4) of the dividend behind the 341 and repeat the process: 3414 / 578

On to step 4:
If we divide 3414 by 578, we get 5 and a remainder of 524.
Write down 5 as next digit of the result. 
Result so far: 15.0
If we take 2890 away from 3414, we end up with 524.
Fetch the next digit (5) from the dividend, attach it to 524 and continue: 5245 / 578

On to step 5:
578 can be fit into 5245 9 times, resulting in a remainder of 43.
The number 9 becomes the next digit in our result. 
Result so far: 159.0
Subtract 5202 from 5245 to get 43.
Grab the next digit (8) from the dividend, add it to 43, then carry on: 438 / 578

Advancing to step 6:
438 divided by 578 is 0 with a remainder of 438.
The number 0 becomes the next digit in our result. 
Result so far: 1590.0
Subtract 0 from 438 to get 438.
Fetch the next digit (1) from the dividend, attach it to 438 and continue: 4381 / 578

On to step 7:
The number 578 fits into 4381 7 times, leaving a remainder of 335.
Write down 7 as next digit of the result. 
Result so far: 15907.0
Subtracting 4046 from 4381 leaves us with 335.
Bring next digit (6) of the dividend behind the 335 and repeat the process: 3356 / 578

On to step 8:
578 can be fit into 3356 5 times, resulting in a remainder of 466.
Put 5 as the next digit of the answer. 
Result so far: 159075.0
If we subtract 2890 from 3356, we get 466.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4660, and continue the process.

Advancing to step 9:
578 can be fit into 4660 8 times, resulting in a remainder of 36.
Write down 8 as next digit of the result. 
Result so far: 159075.8
The remainder is 36 after subtracting 4624 from 4660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 10:
360 divided by 578 is 0 with a remainder of 360.
Use 0 as the next digit of our solution. 
Result so far: 159075.8
Deduct 0 from 360 and we're left with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Moving on to step 11:
When dividing 3600 by 578, we get 6 with a remainder of 132.
The next digit of our result is 6. 
Result so far: 159075.806
Subtracting 3468 from 3600 leaves us with 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Advancing to step 12:
If we divide 1320 by 578, we get 2 and a remainder of 164.
Use 2 as the next digit of our solution. 
Result so far: 159075.8062
Subtract 1156 from 1320 to get 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Advancing to step 13:
The number 578 fits into 1640 2 times, leaving a remainder of 484.
Use 2 as the next digit of our solution. 
Result so far: 159075.80622
The remainder is 484 after subtracting 1156 from 1640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4840, and continue the process.

The final outcome is 159075.80622, with a leftover of 0.000484.