51434 ÷ 42 
Our goal is to divide 51434 by 42.

Going ahead to step 1:
The number 42 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 42

Let's proceed to step 2:
If we divide 51 by 42, we get 1 and a remainder of 9.
The next digit of our result is 1. 
Result so far: 1.0
If we take 42 away from 51, we end up with 9.
Bring next digit (4) of the dividend behind the 9 and repeat the process: 94 / 42

Step 3:
42 can be fit into 94 2 times, resulting in a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtract 84 from 94 to get 10.
Take the next digit (3) from the dividend and append it to 10, then repeat: 103 / 42

Advancing to step 4:
If we divide 103 by 42, we get 2 and a remainder of 19.
Write down 2 as next digit of the result. 
Result so far: 122.0
The remainder is 19 after subtracting 84 from 103.
Grab the next digit (4) from the dividend, add it to 19, then carry on: 194 / 42

On to step 5:
194 divided by 42 is 4 with a remainder of 26.
Use 4 as the next digit of our solution. 
Result so far: 1224.0
Deduct 168 from 194 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 6:
When dividing 260 by 42, we get 6 with a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 1224.6
Deduct 252 from 260 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 7:
80 divided by 42 is 1 with a remainder of 38.
Record the quotient 1 as the next digit in the result. 
Result so far: 1224.61
If we subtract 42 from 80, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 8:
The number 42 fits into 380 9 times, leaving a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 1224.619
The remainder is 2 after subtracting 378 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 9:
The number 42 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 1224.619
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 10:
200 divided by 42 is 4 with a remainder of 32.
Write down 4 as next digit of the result. 
Result so far: 1224.61904
Subtract 168 from 200 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 11:
When dividing 320 by 42, we get 7 with a remainder of 26.
The next digit of our result is 7. 
Result so far: 1224.619047
If we subtract 294 from 320, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 12:
The number 42 fits into 260 6 times, leaving a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 1224.6190476
Deduct 252 from 260 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 13:
80 divided by 42 is 1 with a remainder of 38.
The next digit of our result is 1. 
Result so far: 1224.61904761
Subtract 42 from 80 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

The quotient of the division is 1224.61904761, and the remainder is 3.8e-08.