We're dividing 51237 by 43 
We want to figure out the number of times 51237 can be divided by 43.

Moving on to step 1:
When dividing 5 by 43, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 43

Moving on to step 2:
51 divided by 43 is 1 with a remainder of 8.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 43 from 51 leaves us with 8.
Grab the next digit (2) from the dividend, add it to 8, then carry on: 82 / 43

Going ahead to step 3:
43 can be fit into 82 1 times, resulting in a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
The remainder is 39 after subtracting 43 from 82.
Take the next digit (3) from the dividend and append it to 39, then repeat: 393 / 43

Going ahead to step 4:
43 goes into 393 9 times with a remainder of 6.
Use 9 as the next digit of our solution. 
Result so far: 119.0
If we take 387 away from 393, we end up with 6.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 43

Advancing to step 5:
43 goes into 67 1 times with a remainder of 24.
Put 1 as the next digit of the answer. 
Result so far: 1191.0
The remainder is 24 after subtracting 43 from 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 6:
The number 43 fits into 240 5 times, leaving a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 1191.5
The remainder is 25 after subtracting 215 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 7:
The number 43 fits into 250 5 times, leaving a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 1191.55
Deduct 215 from 250 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

After the division, we end up with 1191.55 and a remainder of 0.035.