70870323 divided by 345 
Let's see how many times 345 fits into 70870323.

On to step 1:
345 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Bring next digit (0) of the dividend behind the 7 and repeat the process: 70 / 345

Step 2:
The number 345 fits into 70 0 times, leaving a remainder of 70.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 70 after subtracting 0 from 70.
Fetch the next digit (8) from the dividend, attach it to 70 and continue: 708 / 345

Step 3:
345 can be fit into 708 2 times, resulting in a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 690 away from 708, we end up with 18.
Take the next digit (7) from the dividend and append it to 18, then repeat: 187 / 345

Advancing to step 4:
187 divided by 345 is 0 with a remainder of 187.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
The remainder is 187 after subtracting 0 from 187.
Include the next digit (0) from the dividend after 187, then repeat: 1870 / 345

Going ahead to step 5:
345 goes into 1870 5 times with a remainder of 145.
The next digit of our result is 5. 
Result so far: 205.0
If we take 1725 away from 1870, we end up with 145.
Grab the next digit (3) from the dividend, add it to 145, then carry on: 1453 / 345

Advancing to step 6:
When dividing 1453 by 345, we get 4 with a remainder of 73.
Record the quotient 4 as the next digit in the result. 
Result so far: 2054.0
Subtracting 1380 from 1453 leaves us with 73.
Grab the next digit (2) from the dividend, add it to 73, then carry on: 732 / 345

Advancing to step 7:
If we divide 732 by 345, we get 2 and a remainder of 42.
The number 2 becomes the next digit in our result. 
Result so far: 20542.0
Deduct 690 from 732 and we're left with 42.
Include the next digit (3) from the dividend after 42, then repeat: 423 / 345

On to step 8:
The number 345 fits into 423 1 times, leaving a remainder of 78.
Put 1 as the next digit of the answer. 
Result so far: 205421.0
Deduct 345 from 423 and we're left with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Advancing to step 9:
The number 345 fits into 780 2 times, leaving a remainder of 90.
Record the quotient 2 as the next digit in the result. 
Result so far: 205421.2
Subtracting 690 from 780 leaves us with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Step 10:
345 can be fit into 900 2 times, resulting in a remainder of 210.
The next digit of our result is 2. 
Result so far: 205421.22
Subtracting 690 from 900 leaves us with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

After the division, we end up with 205421.22 and a remainder of 0.21.