78213431 divided by 345 
Our goal is to divide 78213431 by 345.

Moving on to step 1:
If we divide 7 by 345, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 345

Advancing to step 2:
345 goes into 78 0 times with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Take the next digit (2) from the dividend and append it to 78, then repeat: 782 / 345

Moving on to step 3:
The number 345 fits into 782 2 times, leaving a remainder of 92.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 690 from 782 and we're left with 92.
Take the next digit (1) from the dividend and append it to 92, then repeat: 921 / 345

Step 4:
345 goes into 921 2 times with a remainder of 231.
Put 2 as the next digit of the answer. 
Result so far: 22.0
The remainder is 231 after subtracting 690 from 921.
Append the next digit (3) from the dividend to 231 and continue with: 2313 / 345

Advancing to step 5:
The number 345 fits into 2313 6 times, leaving a remainder of 243.
Put 6 as the next digit of the answer. 
Result so far: 226.0
Subtracting 2070 from 2313 leaves us with 243.
Grab the next digit (4) from the dividend, add it to 243, then carry on: 2434 / 345

Step 6:
When dividing 2434 by 345, we get 7 with a remainder of 19.
Put 7 as the next digit of the answer. 
Result so far: 2267.0
Deduct 2415 from 2434 and we're left with 19.
Append the next digit (3) from the dividend to 19 and continue with: 193 / 345

Moving on to step 7:
When dividing 193 by 345, we get 0 with a remainder of 193.
Record the quotient 0 as the next digit in the result. 
Result so far: 22670.0
Subtracting 0 from 193 leaves us with 193.
Take the next digit (1) from the dividend and append it to 193, then repeat: 1931 / 345

Moving on to step 8:
The number 345 fits into 1931 5 times, leaving a remainder of 206.
Write down 5 as next digit of the result. 
Result so far: 226705.0
If we take 1725 away from 1931, we end up with 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Let's proceed to step 9:
The number 345 fits into 2060 5 times, leaving a remainder of 335.
The number 5 becomes the next digit in our result. 
Result so far: 226705.5
If we subtract 1725 from 2060, we get 335.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

Advancing to step 10:
345 goes into 3350 9 times with a remainder of 245.
The next digit of our result is 9. 
Result so far: 226705.59
If we take 3105 away from 3350, we end up with 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Advancing to step 11:
The number 345 fits into 2450 7 times, leaving a remainder of 35.
The next digit of our result is 7. 
Result so far: 226705.597
Deduct 2415 from 2450 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 12:
350 divided by 345 is 1 with a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 226705.5971
If we subtract 345 from 350, we 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.

Moving on to step 13:
50 divided by 345 is 0 with a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 226705.5971
If we take 0 away from 50, we end up 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.

Step 14:
500 divided by 345 is 1 with a remainder of 155.
Put 1 as the next digit of the answer. 
Result so far: 226705.597101
The remainder is 155 after subtracting 345 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Moving on to step 15:
1550 divided by 345 is 4 with a remainder of 170.
The number 4 becomes the next digit in our result. 
Result so far: 226705.5971014
Subtract 1380 from 1550 to get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Going ahead to step 16:
345 can be fit into 1700 4 times, resulting in a remainder of 320.
Put 4 as the next digit of the answer. 
Result so far: 226705.59710144
Deduct 1380 from 1700 and we're left with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

In conclusion, the division gives 226705.59710144 with a balance of 3.2e-07.