We look at the division of 429945 by 51 
Let's see how many times 51 fits into 429945.

Step 1:
When dividing 4 by 51, we get 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 51

Step 2:
51 goes into 42 0 times with a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Grab the next digit (9) from the dividend, add it to 42, then carry on: 429 / 51

Step 3:
When dividing 429 by 51, we get 8 with a remainder of 21.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 408 from 429, we get 21.
Grab the next digit (9) from the dividend, add it to 21, then carry on: 219 / 51

On to step 4:
If we divide 219 by 51, we get 4 and a remainder of 15.
Put 4 as the next digit of the answer. 
Result so far: 84.0
If we subtract 204 from 219, we get 15.
Bring next digit (4) of the dividend behind the 15 and repeat the process: 154 / 51

Moving on to step 5:
When dividing 154 by 51, we get 3 with a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 843.0
Deduct 153 from 154 and we're left with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 51

Moving on to step 6:
51 goes into 15 0 times with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 8430.0
If we subtract 0 from 15, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 7:
150 divided by 51 is 2 with a remainder of 48.
The number 2 becomes the next digit in our result. 
Result so far: 8430.2
The remainder is 48 after subtracting 102 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 8:
480 divided by 51 is 9 with a remainder of 21.
Put 9 as the next digit of the answer. 
Result so far: 8430.29
If we subtract 459 from 480, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 9:
210 divided by 51 is 4 with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 8430.294
If we take 204 away from 210, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 10:
The number 51 fits into 60 1 times, leaving a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 8430.2941
The remainder is 9 after subtracting 51 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 11:
51 goes into 90 1 times with a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 8430.29411
If we subtract 51 from 90, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

After the division, we end up with 8430.29411 and a remainder of 3.9e-05.