We look at the division of 66751873 by 423 
Let's see how many times 423 fits into 66751873.

On to step 1:
6 divided by 423 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 423

On to step 2:
423 goes into 66 0 times with a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Bring next digit (7) of the dividend behind the 66 and repeat the process: 667 / 423

Step 3:
If we divide 667 by 423, we get 1 and a remainder of 244.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 423 from 667 to get 244.
Grab the next digit (5) from the dividend, add it to 244, then carry on: 2445 / 423

Moving on to step 4:
When dividing 2445 by 423, we get 5 with a remainder of 330.
Use 5 as the next digit of our solution. 
Result so far: 15.0
Subtract 2115 from 2445 to get 330.
Append the next digit (1) from the dividend to 330 and continue with: 3301 / 423

On to step 5:
When dividing 3301 by 423, we get 7 with a remainder of 340.
The number 7 becomes the next digit in our result. 
Result so far: 157.0
If we subtract 2961 from 3301, we get 340.
Take the next digit (8) from the dividend and append it to 340, then repeat: 3408 / 423

Going ahead to step 6:
When dividing 3408 by 423, we get 8 with a remainder of 24.
Use 8 as the next digit of our solution. 
Result so far: 1578.0
If we take 3384 away from 3408, we end up with 24.
Fetch the next digit (7) from the dividend, attach it to 24 and continue: 247 / 423

Advancing to step 7:
247 divided by 423 is 0 with a remainder of 247.
Use 0 as the next digit of our solution. 
Result so far: 15780.0
If we subtract 0 from 247, we get 247.
Fetch the next digit (3) from the dividend, attach it to 247 and continue: 2473 / 423

Going ahead to step 8:
423 can be fit into 2473 5 times, resulting in a remainder of 358.
Write down 5 as next digit of the result. 
Result so far: 157805.0
If we take 2115 away from 2473, we end up with 358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3580, and continue the process.

Let's proceed to step 9:
423 can be fit into 3580 8 times, resulting in a remainder of 196.
Use 8 as the next digit of our solution. 
Result so far: 157805.8
Subtracting 3384 from 3580 leaves us with 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Step 10:
The number 423 fits into 1960 4 times, leaving a remainder of 268.
Write down 4 as next digit of the result. 
Result so far: 157805.84
Subtract 1692 from 1960 to get 268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

Let's proceed to step 11:
When dividing 2680 by 423, we get 6 with a remainder of 142.
Put 6 as the next digit of the answer. 
Result so far: 157805.846
Deduct 2538 from 2680 and we're left with 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

Moving on to step 12:
The number 423 fits into 1420 3 times, leaving a remainder of 151.
The next digit of our result is 3. 
Result so far: 157805.8463
If we subtract 1269 from 1420, we get 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

Step 13:
When dividing 1510 by 423, we get 3 with a remainder of 241.
Write down 3 as next digit of the result. 
Result so far: 157805.84633
Subtracting 1269 from 1510 leaves us with 241.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2410, and continue the process.

The quotient of the division is 157805.84633, and the remainder is 0.000241.