We look at the division of 3510513 by 258 
We're looking to find how many times 258 goes into 3510513.

Step 1:
The number 258 fits into 3 0 times, leaving a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 258

Advancing to step 2:
If we divide 35 by 258, we get 0 and a remainder of 35.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 35 after subtracting 0 from 35.
Fetch the next digit (1) from the dividend, attach it to 35 and continue: 351 / 258

Step 3:
When dividing 351 by 258, we get 1 with a remainder of 93.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 258 from 351, we get 93.
Bring next digit (0) of the dividend behind the 93 and repeat the process: 930 / 258

On to step 4:
The number 258 fits into 930 3 times, leaving a remainder of 156.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
If we subtract 774 from 930, we get 156.
Fetch the next digit (5) from the dividend, attach it to 156 and continue: 1565 / 258

On to step 5:
When dividing 1565 by 258, we get 6 with a remainder of 17.
Use 6 as the next digit of our solution. 
Result so far: 136.0
Subtracting 1548 from 1565 leaves us with 17.
Take the next digit (1) from the dividend and append it to 17, then repeat: 171 / 258

Step 6:
The number 258 fits into 171 0 times, leaving a remainder of 171.
Use 0 as the next digit of our solution. 
Result so far: 1360.0
If we subtract 0 from 171, we get 171.
Fetch the next digit (3) from the dividend, attach it to 171 and continue: 1713 / 258

Let's proceed to step 7:
If we divide 1713 by 258, we get 6 and a remainder of 165.
Record the quotient 6 as the next digit in the result. 
Result so far: 13606.0
Subtract 1548 from 1713 to get 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

On to step 8:
1650 divided by 258 is 6 with a remainder of 102.
Use 6 as the next digit of our solution. 
Result so far: 13606.6
Deduct 1548 from 1650 and we're left with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

On to step 9:
258 can be fit into 1020 3 times, resulting in a remainder of 246.
Record the quotient 3 as the next digit in the result. 
Result so far: 13606.63
If we take 774 away from 1020, we end up with 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Advancing to step 10:
The number 258 fits into 2460 9 times, leaving a remainder of 138.
The next digit of our result is 9. 
Result so far: 13606.639
Deduct 2322 from 2460 and we're left with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Step 11:
258 goes into 1380 5 times with a remainder of 90.
Write down 5 as next digit of the result. 
Result so far: 13606.6395
The remainder is 90 after subtracting 1290 from 1380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Moving on to step 12:
258 goes into 900 3 times with a remainder of 126.
Use 3 as the next digit of our solution. 
Result so far: 13606.63953
If we subtract 774 from 900, we get 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Moving on to step 13:
258 goes into 1260 4 times with a remainder of 228.
Record the quotient 4 as the next digit in the result. 
Result so far: 13606.639534
The remainder is 228 after subtracting 1032 from 1260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

On to step 14:
258 can be fit into 2280 8 times, resulting in a remainder of 216.
The number 8 becomes the next digit in our result. 
Result so far: 13606.6395348
If we take 2064 away from 2280, we end up with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Step 15:
When dividing 2160 by 258, we get 8 with a remainder of 96.
Use 8 as the next digit of our solution. 
Result so far: 13606.63953488
If we take 2064 away from 2160, we end up with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

The final result is 13606.63953488 with a remainder of 9.6e-08.