We look at the division of 42593305 by 991 
We're looking to find how many times 991 goes into 42593305.

On to step 1:
If we divide 4 by 991, we get 0 and a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 991

Advancing to step 2:
991 goes into 42 0 times with a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Include the next digit (5) from the dividend after 42, then repeat: 425 / 991

Going ahead to step 3:
If we divide 425 by 991, we get 0 and a remainder of 425.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 425 and we're left with 425.
Include the next digit (9) from the dividend after 425, then repeat: 4259 / 991

Advancing to step 4:
991 goes into 4259 4 times with a remainder of 295.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 3964 from 4259 leaves us with 295.
Fetch the next digit (3) from the dividend, attach it to 295 and continue: 2953 / 991

Going ahead to step 5:
2953 divided by 991 is 2 with a remainder of 971.
Use 2 as the next digit of our solution. 
Result so far: 42.0
Subtracting 1982 from 2953 leaves us with 971.
Grab the next digit (3) from the dividend, add it to 971, then carry on: 9713 / 991

Let's proceed to step 6:
When dividing 9713 by 991, we get 9 with a remainder of 794.
Write down 9 as next digit of the result. 
Result so far: 429.0
Subtracting 8919 from 9713 leaves us with 794.
Bring next digit (0) of the dividend behind the 794 and repeat the process: 7940 / 991

Going ahead to step 7:
If we divide 7940 by 991, we get 8 and a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 4298.0
If we subtract 7928 from 7940, we get 12.
Grab the next digit (5) from the dividend, add it to 12, then carry on: 125 / 991

On to step 8:
991 can be fit into 125 0 times, resulting in a remainder of 125.
The number 0 becomes the next digit in our result. 
Result so far: 42980.0
Deduct 0 from 125 and we're left with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Moving on to step 9:
991 goes into 1250 1 times with a remainder of 259.
Use 1 as the next digit of our solution. 
Result so far: 42980.1
Subtract 991 from 1250 to get 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

Advancing to step 10:
When dividing 2590 by 991, we get 2 with a remainder of 608.
The number 2 becomes the next digit in our result. 
Result so far: 42980.12
If we subtract 1982 from 2590, we get 608.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6080, and continue the process.

Going ahead to step 11:
991 can be fit into 6080 6 times, resulting in a remainder of 134.
The next digit of our result is 6. 
Result so far: 42980.126
If we subtract 5946 from 6080, we get 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

Step 12:
The number 991 fits into 1340 1 times, leaving a remainder of 349.
Use 1 as the next digit of our solution. 
Result so far: 42980.1261
If we take 991 away from 1340, we end up with 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Step 13:
When dividing 3490 by 991, we get 3 with a remainder of 517.
Put 3 as the next digit of the answer. 
Result so far: 42980.12613
Deduct 2973 from 3490 and we're left with 517.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5170, and continue the process.

On to step 14:
5170 divided by 991 is 5 with a remainder of 215.
Use 5 as the next digit of our solution. 
Result so far: 42980.126135
The remainder is 215 after subtracting 4955 from 5170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Going ahead to step 15:
When dividing 2150 by 991, we get 2 with a remainder of 168.
Write down 2 as next digit of the result. 
Result so far: 42980.1261352
If we take 1982 away from 2150, we end up with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Advancing to step 16:
991 can be fit into 1680 1 times, resulting in a remainder of 689.
Record the quotient 1 as the next digit in the result. 
Result so far: 42980.12613521
If we subtract 991 from 1680, we get 689.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6890, and continue the process.

Our division results in 42980.12613521 with a remaining 6.89e-07.