9859994 divided by 258 
Our goal is to divide 9859994 by 258.

Let's proceed to step 1:
When dividing 9 by 258, we get 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Bring next digit (8) of the dividend behind the 9 and repeat the process: 98 / 258

Let's proceed to step 2:
98 divided by 258 is 0 with a remainder of 98.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 98 and we're left with 98.
Append the next digit (5) from the dividend to 98 and continue with: 985 / 258

Let's proceed to step 3:
If we divide 985 by 258, we get 3 and a remainder of 211.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 774 from 985, we get 211.
Bring next digit (9) of the dividend behind the 211 and repeat the process: 2119 / 258

Let's proceed to step 4:
The number 258 fits into 2119 8 times, leaving a remainder of 55.
The number 8 becomes the next digit in our result. 
Result so far: 38.0
Deduct 2064 from 2119 and we're left with 55.
Include the next digit (9) from the dividend after 55, then repeat: 559 / 258

Step 5:
258 can be fit into 559 2 times, resulting in a remainder of 43.
Record the quotient 2 as the next digit in the result. 
Result so far: 382.0
If we take 516 away from 559, we end up with 43.
Grab the next digit (9) from the dividend, add it to 43, then carry on: 439 / 258

Advancing to step 6:
If we divide 439 by 258, we get 1 and a remainder of 181.
Record the quotient 1 as the next digit in the result. 
Result so far: 3821.0
If we subtract 258 from 439, we get 181.
Grab the next digit (4) from the dividend, add it to 181, then carry on: 1814 / 258

On to step 7:
258 can be fit into 1814 7 times, resulting in a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 38217.0
Deduct 1806 from 1814 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 8:
258 can be fit into 80 0 times, resulting in a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 38217.0
Deduct 0 from 80 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 9:
258 goes into 800 3 times with a remainder of 26.
Use 3 as the next digit of our solution. 
Result so far: 38217.03
The remainder is 26 after subtracting 774 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 10:
The number 258 fits into 260 1 times, leaving a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 38217.031
If we subtract 258 from 260, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 11:
If we divide 20 by 258, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 38217.031
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 12:
If we divide 200 by 258, we get 0 and a remainder of 200.
Use 0 as the next digit of our solution. 
Result so far: 38217.031
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

The final outcome is 38217.031, with a leftover of 0.0002.