42986939 ÷ 586 
We're looking to find how many times 586 goes into 42986939.

Step 1:
If we divide 4 by 586, we get 0 and a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 586

Advancing to step 2:
586 goes into 42 0 times with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Grab the next digit (9) from the dividend, add it to 42, then carry on: 429 / 586

On to step 3:
The number 586 fits into 429 0 times, leaving a remainder of 429.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 429, we get 429.
Bring next digit (8) of the dividend behind the 429 and repeat the process: 4298 / 586

Let's proceed to step 4:
586 can be fit into 4298 7 times, resulting in a remainder of 196.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we subtract 4102 from 4298, we get 196.
Grab the next digit (6) from the dividend, add it to 196, then carry on: 1966 / 586

Advancing to step 5:
When dividing 1966 by 586, we get 3 with a remainder of 208.
Use 3 as the next digit of our solution. 
Result so far: 73.0
The remainder is 208 after subtracting 1758 from 1966.
Bring next digit (9) of the dividend behind the 208 and repeat the process: 2089 / 586

Let's proceed to step 6:
586 goes into 2089 3 times with a remainder of 331.
Use 3 as the next digit of our solution. 
Result so far: 733.0
Deduct 1758 from 2089 and we're left with 331.
Fetch the next digit (3) from the dividend, attach it to 331 and continue: 3313 / 586

Moving on to step 7:
If we divide 3313 by 586, we get 5 and a remainder of 383.
The next digit of our result is 5. 
Result so far: 7335.0
The remainder is 383 after subtracting 2930 from 3313.
Fetch the next digit (9) from the dividend, attach it to 383 and continue: 3839 / 586

Let's proceed to step 8:
When dividing 3839 by 586, we get 6 with a remainder of 323.
Put 6 as the next digit of the answer. 
Result so far: 73356.0
Subtract 3516 from 3839 to get 323.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3230, and continue the process.

Let's proceed to step 9:
When dividing 3230 by 586, we get 5 with a remainder of 300.
Write down 5 as next digit of the result. 
Result so far: 73356.5
The remainder is 300 after subtracting 2930 from 3230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

On to step 10:
When dividing 3000 by 586, we get 5 with a remainder of 70.
Put 5 as the next digit of the answer. 
Result so far: 73356.55
Subtracting 2930 from 3000 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The final outcome is 73356.55, with a leftover of 0.07.