57485830 ÷ 391 
We're looking to find how many times 391 goes into 57485830.

Let's proceed to step 1:
When dividing 5 by 391, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 391

Advancing to step 2:
391 can be fit into 57 0 times, resulting in a remainder of 57.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 57 and we're left with 57.
Include the next digit (4) from the dividend after 57, then repeat: 574 / 391

Advancing to step 3:
574 divided by 391 is 1 with a remainder of 183.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 391 away from 574, we end up with 183.
Bring next digit (8) of the dividend behind the 183 and repeat the process: 1838 / 391

On to step 4:
If we divide 1838 by 391, we get 4 and a remainder of 274.
The next digit of our result is 4. 
Result so far: 14.0
The remainder is 274 after subtracting 1564 from 1838.
Include the next digit (5) from the dividend after 274, then repeat: 2745 / 391

Moving on to step 5:
2745 divided by 391 is 7 with a remainder of 8.
The number 7 becomes the next digit in our result. 
Result so far: 147.0
Deduct 2737 from 2745 and we're left with 8.
Include the next digit (8) from the dividend after 8, then repeat: 88 / 391

Step 6:
If we divide 88 by 391, we get 0 and a remainder of 88.
Write down 0 as next digit of the result. 
Result so far: 1470.0
If we take 0 away from 88, we end up with 88.
Grab the next digit (3) from the dividend, add it to 88, then carry on: 883 / 391

Step 7:
When dividing 883 by 391, we get 2 with a remainder of 101.
The next digit of our result is 2. 
Result so far: 14702.0
If we subtract 782 from 883, we get 101.
Append the next digit (0) from the dividend to 101 and continue with: 1010 / 391

Advancing to step 8:
391 can be fit into 1010 2 times, resulting in a remainder of 228.
Write down 2 as next digit of the result. 
Result so far: 147022.0
Subtract 782 from 1010 to get 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Moving on to step 9:
If we divide 2280 by 391, we get 5 and a remainder of 325.
Put 5 as the next digit of the answer. 
Result so far: 147022.5
Deduct 1955 from 2280 and we're left with 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

Let's proceed to step 10:
If we divide 3250 by 391, we get 8 and a remainder of 122.
Use 8 as the next digit of our solution. 
Result so far: 147022.58
The remainder is 122 after subtracting 3128 from 3250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Step 11:
When dividing 1220 by 391, we get 3 with a remainder of 47.
Put 3 as the next digit of the answer. 
Result so far: 147022.583
The remainder is 47 after subtracting 1173 from 1220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Step 12:
470 divided by 391 is 1 with a remainder of 79.
The next digit of our result is 1. 
Result so far: 147022.5831
If we take 391 away from 470, we end up with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Let's proceed to step 13:
391 can be fit into 790 2 times, resulting in a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 147022.58312
The remainder is 8 after subtracting 782 from 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 14:
If we divide 80 by 391, we get 0 and a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 147022.58312
The remainder is 80 after subtracting 0 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 15:
When dividing 800 by 391, we get 2 with a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 147022.5831202
If we take 782 away from 800, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 16:
180 divided by 391 is 0 with a remainder of 180.
Put 0 as the next digit of the answer. 
Result so far: 147022.5831202
Subtracting 0 from 180 leaves us with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

The final outcome is 147022.5831202, with a leftover of 1.8e-07.