80216137 ÷ 258 
We want to divide 80216137 by 258.

On to step 1:
258 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 258

Step 2:
If we divide 80 by 258, we get 0 and a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 80 leaves us with 80.
Include the next digit (2) from the dividend after 80, then repeat: 802 / 258

On to step 3:
When dividing 802 by 258, we get 3 with a remainder of 28.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Deduct 774 from 802 and we're left with 28.
Grab the next digit (1) from the dividend, add it to 28, then carry on: 281 / 258

On to step 4:
281 divided by 258 is 1 with a remainder of 23.
The next digit of our result is 1. 
Result so far: 31.0
Subtracting 258 from 281 leaves us with 23.
Append the next digit (6) from the dividend to 23 and continue with: 236 / 258

Moving on to step 5:
The number 258 fits into 236 0 times, leaving a remainder of 236.
Record the quotient 0 as the next digit in the result. 
Result so far: 310.0
Subtract 0 from 236 to get 236.
Fetch the next digit (1) from the dividend, attach it to 236 and continue: 2361 / 258

Step 6:
The number 258 fits into 2361 9 times, leaving a remainder of 39.
The number 9 becomes the next digit in our result. 
Result so far: 3109.0
Deduct 2322 from 2361 and we're left with 39.
Grab the next digit (3) from the dividend, add it to 39, then carry on: 393 / 258

Step 7:
If we divide 393 by 258, we get 1 and a remainder of 135.
The number 1 becomes the next digit in our result. 
Result so far: 31091.0
Subtracting 258 from 393 leaves us with 135.
Grab the next digit (7) from the dividend, add it to 135, then carry on: 1357 / 258

Advancing to step 8:
258 goes into 1357 5 times with a remainder of 67.
The next digit of our result is 5. 
Result so far: 310915.0
If we take 1290 away from 1357, we end up with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Let's proceed to step 9:
The number 258 fits into 670 2 times, leaving a remainder of 154.
Put 2 as the next digit of the answer. 
Result so far: 310915.2
Subtracting 516 from 670 leaves us with 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

Advancing to step 10:
1540 divided by 258 is 5 with a remainder of 250.
Write down 5 as next digit of the result. 
Result so far: 310915.25
Subtract 1290 from 1540 to get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

On to step 11:
The number 258 fits into 2500 9 times, leaving a remainder of 178.
Write down 9 as next digit of the result. 
Result so far: 310915.259
Deduct 2322 from 2500 and we're left with 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

On to step 12:
258 can be fit into 1780 6 times, resulting in a remainder of 232.
Put 6 as the next digit of the answer. 
Result so far: 310915.2596
The remainder is 232 after subtracting 1548 from 1780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Let's proceed to step 13:
When dividing 2320 by 258, we get 8 with a remainder of 256.
Use 8 as the next digit of our solution. 
Result so far: 310915.25968
If we subtract 2064 from 2320, we get 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Let's proceed to step 14:
The number 258 fits into 2560 9 times, leaving a remainder of 238.
Write down 9 as next digit of the result. 
Result so far: 310915.259689
Subtracting 2322 from 2560 leaves us with 238.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2380, and continue the process.

Step 15:
When dividing 2380 by 258, we get 9 with a remainder of 58.
The next digit of our result is 9. 
Result so far: 310915.2596899
If we subtract 2322 from 2380, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Our division results in 310915.2596899 with a remaining 5.8e-07.