75177149 ÷ 423 
We want to figure out the number of times 75177149 can be divided by 423.

On to step 1:
423 can be fit into 7 0 times, resulting in a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (5) from the dividend, add it to 7, then carry on: 75 / 423

Let's proceed to step 2:
When dividing 75 by 423, we get 0 with a remainder of 75.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 75 leaves us with 75.
Append the next digit (1) from the dividend to 75 and continue with: 751 / 423

Advancing to step 3:
423 goes into 751 1 times with a remainder of 328.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 423 from 751 leaves us with 328.
Take the next digit (7) from the dividend and append it to 328, then repeat: 3287 / 423

Going ahead to step 4:
423 can be fit into 3287 7 times, resulting in a remainder of 326.
Put 7 as the next digit of the answer. 
Result so far: 17.0
If we subtract 2961 from 3287, we get 326.
Include the next digit (7) from the dividend after 326, then repeat: 3267 / 423

Step 5:
The number 423 fits into 3267 7 times, leaving a remainder of 306.
Put 7 as the next digit of the answer. 
Result so far: 177.0
If we subtract 2961 from 3267, we get 306.
Bring next digit (1) of the dividend behind the 306 and repeat the process: 3061 / 423

Let's proceed to step 6:
If we divide 3061 by 423, we get 7 and a remainder of 100.
Use 7 as the next digit of our solution. 
Result so far: 1777.0
The remainder is 100 after subtracting 2961 from 3061.
Bring next digit (4) of the dividend behind the 100 and repeat the process: 1004 / 423

Moving on to step 7:
423 goes into 1004 2 times with a remainder of 158.
The number 2 becomes the next digit in our result. 
Result so far: 17772.0
Subtracting 846 from 1004 leaves us with 158.
Include the next digit (9) from the dividend after 158, then repeat: 1589 / 423

Step 8:
The number 423 fits into 1589 3 times, leaving a remainder of 320.
Put 3 as the next digit of the answer. 
Result so far: 177723.0
If we subtract 1269 from 1589, we get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Let's proceed to step 9:
When dividing 3200 by 423, we get 7 with a remainder of 239.
Record the quotient 7 as the next digit in the result. 
Result so far: 177723.7
Subtracting 2961 from 3200 leaves us with 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

Moving on to step 10:
423 goes into 2390 5 times with a remainder of 275.
Record the quotient 5 as the next digit in the result. 
Result so far: 177723.75
Deduct 2115 from 2390 and we're left with 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Moving on to step 11:
423 goes into 2750 6 times with a remainder of 212.
Use 6 as the next digit of our solution. 
Result so far: 177723.756
Deduct 2538 from 2750 and we're left with 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Moving on to step 12:
423 goes into 2120 5 times with a remainder of 5.
The next digit of our result is 5. 
Result so far: 177723.7565
Subtract 2115 from 2120 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 13:
423 goes into 50 0 times with a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 177723.7565
Subtracting 0 from 50 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 14:
When dividing 500 by 423, we get 1 with a remainder of 77.
Use 1 as the next digit of our solution. 
Result so far: 177723.756501
If we subtract 423 from 500, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Advancing to step 15:
If we divide 770 by 423, we get 1 and a remainder of 347.
The next digit of our result is 1. 
Result so far: 177723.7565011
The remainder is 347 after subtracting 423 from 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

The final outcome is 177723.7565011, with a leftover of 3.47e-06.