We look at the division of 89490874 by 642 
Let's see how many times 642 fits into 89490874.

On to step 1:
The number 642 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (9) from the dividend after 8, then repeat: 89 / 642

On to step 2:
If we divide 89 by 642, we get 0 and a remainder of 89.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 89 to get 89.
Take the next digit (4) from the dividend and append it to 89, then repeat: 894 / 642

On to step 3:
894 divided by 642 is 1 with a remainder of 252.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 642 from 894, we get 252.
Append the next digit (9) from the dividend to 252 and continue with: 2529 / 642

Step 4:
2529 divided by 642 is 3 with a remainder of 603.
Write down 3 as next digit of the result. 
Result so far: 13.0
If we take 1926 away from 2529, we end up with 603.
Take the next digit (0) from the dividend and append it to 603, then repeat: 6030 / 642

Step 5:
The number 642 fits into 6030 9 times, leaving a remainder of 252.
The next digit of our result is 9. 
Result so far: 139.0
The remainder is 252 after subtracting 5778 from 6030.
Append the next digit (8) from the dividend to 252 and continue with: 2528 / 642

Advancing to step 6:
2528 divided by 642 is 3 with a remainder of 602.
The number 3 becomes the next digit in our result. 
Result so far: 1393.0
Subtracting 1926 from 2528 leaves us with 602.
Fetch the next digit (7) from the dividend, attach it to 602 and continue: 6027 / 642

Moving on to step 7:
642 goes into 6027 9 times with a remainder of 249.
The next digit of our result is 9. 
Result so far: 13939.0
Deduct 5778 from 6027 and we're left with 249.
Take the next digit (4) from the dividend and append it to 249, then repeat: 2494 / 642

Moving on to step 8:
642 goes into 2494 3 times with a remainder of 568.
Put 3 as the next digit of the answer. 
Result so far: 139393.0
The remainder is 568 after subtracting 1926 from 2494.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

Moving on to step 9:
When dividing 5680 by 642, we get 8 with a remainder of 544.
Write down 8 as next digit of the result. 
Result so far: 139393.8
If we subtract 5136 from 5680, we get 544.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5440, and continue the process.

On to step 10:
If we divide 5440 by 642, we get 8 and a remainder of 304.
Write down 8 as next digit of the result. 
Result so far: 139393.88
If we subtract 5136 from 5440, we get 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

In conclusion, the division gives 139393.88 with a balance of 0.304.