57840 ÷ 43 
We want to figure out the number of times 57840 can be divided by 43.

On to step 1:
If we divide 5 by 43, we get 0 and a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 43

Let's proceed to step 2:
If we divide 57 by 43, we get 1 and a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 43 away from 57, we end up with 14.
Include the next digit (8) from the dividend after 14, then repeat: 148 / 43

Let's proceed to step 3:
If we divide 148 by 43, we get 3 and a remainder of 19.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Subtract 129 from 148 to get 19.
Bring next digit (4) of the dividend behind the 19 and repeat the process: 194 / 43

Going ahead to step 4:
If we divide 194 by 43, we get 4 and a remainder of 22.
Put 4 as the next digit of the answer. 
Result so far: 134.0
Deduct 172 from 194 and we're left with 22.
Take the next digit (0) from the dividend and append it to 22, then repeat: 220 / 43

Going ahead to step 5:
The number 43 fits into 220 5 times, leaving a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 1345.0
The remainder is 5 after subtracting 215 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 6:
43 can be fit into 50 1 times, resulting in a remainder of 7.
The next digit of our result is 1. 
Result so far: 1345.1
Deduct 43 from 50 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 7:
When dividing 70 by 43, we get 1 with a remainder of 27.
Put 1 as the next digit of the answer. 
Result so far: 1345.11
Deduct 43 from 70 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Our division results in 1345.11 with a remaining 0.027.