We're dividing 428603 by 66 
We want to divide 428603 by 66.

Going ahead to step 1:
If we divide 4 by 66, we get 0 and a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 66

Advancing to step 2:
When dividing 42 by 66, we get 0 with a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Fetch the next digit (8) from the dividend, attach it to 42 and continue: 428 / 66

Advancing to step 3:
If we divide 428 by 66, we get 6 and a remainder of 32.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Subtracting 396 from 428 leaves us with 32.
Append the next digit (6) from the dividend to 32 and continue with: 326 / 66

Moving on to step 4:
326 divided by 66 is 4 with a remainder of 62.
The next digit of our result is 4. 
Result so far: 64.0
Subtract 264 from 326 to get 62.
Grab the next digit (0) from the dividend, add it to 62, then carry on: 620 / 66

Step 5:
When dividing 620 by 66, we get 9 with a remainder of 26.
The number 9 becomes the next digit in our result. 
Result so far: 649.0
If we subtract 594 from 620, we get 26.
Fetch the next digit (3) from the dividend, attach it to 26 and continue: 263 / 66

Going ahead to step 6:
When dividing 263 by 66, we get 3 with a remainder of 65.
Record the quotient 3 as the next digit in the result. 
Result so far: 6493.0
If we take 198 away from 263, we end up with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Moving on to step 7:
66 can be fit into 650 9 times, resulting in a remainder of 56.
Write down 9 as next digit of the result. 
Result so far: 6493.9
If we subtract 594 from 650, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 8:
66 can be fit into 560 8 times, resulting in a remainder of 32.
The next digit of our result is 8. 
Result so far: 6493.98
Deduct 528 from 560 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 9:
66 can be fit into 320 4 times, resulting in a remainder of 56.
Use 4 as the next digit of our solution. 
Result so far: 6493.984
Deduct 264 from 320 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 10:
66 can be fit into 560 8 times, resulting in a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 6493.9848
Deduct 528 from 560 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 11:
The number 66 fits into 320 4 times, leaving a remainder of 56.
Put 4 as the next digit of the answer. 
Result so far: 6493.98484
Deduct 264 from 320 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Step 12:
66 goes into 560 8 times with a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 6493.984848
Subtract 528 from 560 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.

Step 13:
320 divided by 66 is 4 with a remainder of 56.
Record the quotient 4 as the next digit in the result. 
Result so far: 6493.9848484
Deduct 264 from 320 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 14:
560 divided by 66 is 8 with a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 6493.98484848
Subtract 528 from 560 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.

The final result is 6493.98484848 with a remainder of 3.2e-08.