78657843 ÷ 423 
We want to divide 78657843 by 423.

On to step 1:
The number 423 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 423

Going ahead to step 2:
If we divide 78 by 423, we get 0 and a remainder of 78.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Fetch the next digit (6) from the dividend, attach it to 78 and continue: 786 / 423

Going ahead to step 3:
The number 423 fits into 786 1 times, leaving a remainder of 363.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 423 from 786 and we're left with 363.
Grab the next digit (5) from the dividend, add it to 363, then carry on: 3635 / 423

Step 4:
The number 423 fits into 3635 8 times, leaving a remainder of 251.
Use 8 as the next digit of our solution. 
Result so far: 18.0
Deduct 3384 from 3635 and we're left with 251.
Bring next digit (7) of the dividend behind the 251 and repeat the process: 2517 / 423

Advancing to step 5:
423 can be fit into 2517 5 times, resulting in a remainder of 402.
Write down 5 as next digit of the result. 
Result so far: 185.0
If we take 2115 away from 2517, we end up with 402.
Append the next digit (8) from the dividend to 402 and continue with: 4028 / 423

Advancing to step 6:
423 goes into 4028 9 times with a remainder of 221.
Use 9 as the next digit of our solution. 
Result so far: 1859.0
The remainder is 221 after subtracting 3807 from 4028.
Grab the next digit (4) from the dividend, add it to 221, then carry on: 2214 / 423

Let's proceed to step 7:
If we divide 2214 by 423, we get 5 and a remainder of 99.
The number 5 becomes the next digit in our result. 
Result so far: 18595.0
Subtracting 2115 from 2214 leaves us with 99.
Bring next digit (3) of the dividend behind the 99 and repeat the process: 993 / 423

Let's proceed to step 8:
When dividing 993 by 423, we get 2 with a remainder of 147.
Use 2 as the next digit of our solution. 
Result so far: 185952.0
If we take 846 away from 993, we end up with 147.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

Let's proceed to step 9:
1470 divided by 423 is 3 with a remainder of 201.
Write down 3 as next digit of the result. 
Result so far: 185952.3
If we take 1269 away from 1470, we end up with 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2010, and continue the process.

On to step 10:
423 can be fit into 2010 4 times, resulting in a remainder of 318.
The next digit of our result is 4. 
Result so far: 185952.34
If we take 1692 away from 2010, we end up with 318.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Let's proceed to step 11:
3180 divided by 423 is 7 with a remainder of 219.
Write down 7 as next digit of the result. 
Result so far: 185952.347
Deduct 2961 from 3180 and we're left with 219.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2190, and continue the process.

Going ahead to step 12:
The number 423 fits into 2190 5 times, leaving a remainder of 75.
Use 5 as the next digit of our solution. 
Result so far: 185952.3475
Deduct 2115 from 2190 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Going ahead to step 13:
When dividing 750 by 423, we get 1 with a remainder of 327.
Record the quotient 1 as the next digit in the result. 
Result so far: 185952.34751
The remainder is 327 after subtracting 423 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3270, and continue the process.

Advancing to step 14:
423 goes into 3270 7 times with a remainder of 309.
Use 7 as the next digit of our solution. 
Result so far: 185952.347517
If we subtract 2961 from 3270, we get 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

Going ahead to step 15:
423 can be fit into 3090 7 times, resulting in a remainder of 129.
The number 7 becomes the next digit in our result. 
Result so far: 185952.3475177
Subtract 2961 from 3090 to get 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

The final result is 185952.3475177 with a remainder of 1.29e-06.