31309930 ÷ 730 
We're looking to find how many times 730 goes into 31309930.

On to step 1:
730 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 730

Advancing to step 2:
The number 730 fits into 31 0 times, leaving a remainder of 31.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 31 after subtracting 0 from 31.
Take the next digit (3) from the dividend and append it to 31, then repeat: 313 / 730

On to step 3:
The number 730 fits into 313 0 times, leaving a remainder of 313.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 313 after subtracting 0 from 313.
Bring next digit (0) of the dividend behind the 313 and repeat the process: 3130 / 730

Moving on to step 4:
The number 730 fits into 3130 4 times, leaving a remainder of 210.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 2920 from 3130 to get 210.
Append the next digit (9) from the dividend to 210 and continue with: 2109 / 730

Going ahead to step 5:
When dividing 2109 by 730, we get 2 with a remainder of 649.
Put 2 as the next digit of the answer. 
Result so far: 42.0
If we take 1460 away from 2109, we end up with 649.
Fetch the next digit (9) from the dividend, attach it to 649 and continue: 6499 / 730

On to step 6:
6499 divided by 730 is 8 with a remainder of 659.
Put 8 as the next digit of the answer. 
Result so far: 428.0
Subtracting 5840 from 6499 leaves us with 659.
Grab the next digit (3) from the dividend, add it to 659, then carry on: 6593 / 730

Let's proceed to step 7:
6593 divided by 730 is 9 with a remainder of 23.
Use 9 as the next digit of our solution. 
Result so far: 4289.0
If we subtract 6570 from 6593, we get 23.
Append the next digit (0) from the dividend to 23 and continue with: 230 / 730

On to step 8:
730 goes into 230 0 times with a remainder of 230.
Write down 0 as next digit of the result. 
Result so far: 42890.0
Deduct 0 from 230 and we're left with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Going ahead to step 9:
If we divide 2300 by 730, we get 3 and a remainder of 110.
The next digit of our result is 3. 
Result so far: 42890.3
Deduct 2190 from 2300 and we're left with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Going ahead to step 10:
The number 730 fits into 1100 1 times, leaving a remainder of 370.
Write down 1 as next digit of the result. 
Result so far: 42890.31
Subtracting 730 from 1100 leaves us with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Advancing to step 11:
The number 730 fits into 3700 5 times, leaving a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 42890.315
Subtracting 3650 from 3700 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 12:
730 goes into 500 0 times with a remainder of 500.
The next digit of our result is 0. 
Result so far: 42890.315
If we take 0 away from 500, we end up with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Step 13:
5000 divided by 730 is 6 with a remainder of 620.
Write down 6 as next digit of the result. 
Result so far: 42890.31506
If we subtract 4380 from 5000, we get 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

On to step 14:
730 goes into 6200 8 times with a remainder of 360.
Use 8 as the next digit of our solution. 
Result so far: 42890.315068
Deduct 5840 from 6200 and we're left with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

On to step 15:
The number 730 fits into 3600 4 times, leaving a remainder of 680.
The next digit of our result is 4. 
Result so far: 42890.3150684
If we take 2920 away from 3600, we end up with 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Going ahead to step 16:
When dividing 6800 by 730, we get 9 with a remainder of 230.
The number 9 becomes the next digit in our result. 
Result so far: 42890.31506849
If we take 6570 away from 6800, we end up with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

The final result is 42890.31506849 with a remainder of 2.3e-07.