We're dividing 342387 by 51 
We're looking to find how many times 51 goes into 342387.

Step 1:
When dividing 3 by 51, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 51

Advancing to step 2:
51 can be fit into 34 0 times, resulting in a remainder of 34.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 34 and we're left with 34.
Fetch the next digit (2) from the dividend, attach it to 34 and continue: 342 / 51

Advancing to step 3:
When dividing 342 by 51, we get 6 with a remainder of 36.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we take 306 away from 342, we end up with 36.
Fetch the next digit (3) from the dividend, attach it to 36 and continue: 363 / 51

On to step 4:
If we divide 363 by 51, we get 7 and a remainder of 6.
The next digit of our result is 7. 
Result so far: 67.0
If we subtract 357 from 363, we get 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 51

Advancing to step 5:
51 goes into 68 1 times with a remainder of 17.
Put 1 as the next digit of the answer. 
Result so far: 671.0
The remainder is 17 after subtracting 51 from 68.
Take the next digit (7) from the dividend and append it to 17, then repeat: 177 / 51

On to step 6:
If we divide 177 by 51, we get 3 and a remainder of 24.
Write down 3 as next digit of the result. 
Result so far: 6713.0
Deduct 153 from 177 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 7:
When dividing 240 by 51, we get 4 with a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 6713.4
If we subtract 204 from 240, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 8:
When dividing 360 by 51, we get 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 6713.47
The remainder is 3 after subtracting 357 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 9:
30 divided by 51 is 0 with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 6713.47
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 10:
If we divide 300 by 51, we get 5 and a remainder of 45.
The next digit of our result is 5. 
Result so far: 6713.4705
The remainder is 45 after subtracting 255 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 11:
450 divided by 51 is 8 with a remainder of 42.
The next digit of our result is 8. 
Result so far: 6713.47058
If we take 408 away from 450, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 12:
51 can be fit into 420 8 times, resulting in a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 6713.470588
The remainder is 12 after subtracting 408 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 6713.470588 with a remainder of 1.2e-06.