87429603 ÷ 90 
We want to divide 87429603 by 90.

Moving on to step 1:
90 goes into 8 0 times with 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.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 90

Let's proceed to step 2:
90 can be fit into 87 0 times, resulting in a remainder of 87.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 87 and we're left with 87.
Grab the next digit (4) from the dividend, add it to 87, then carry on: 874 / 90

Step 3:
90 can be fit into 874 9 times, resulting in a remainder of 64.
Put 9 as the next digit of the answer. 
Result so far: 9.0
The remainder is 64 after subtracting 810 from 874.
Bring next digit (2) of the dividend behind the 64 and repeat the process: 642 / 90

Moving on to step 4:
The number 90 fits into 642 7 times, leaving a remainder of 12.
The next digit of our result is 7. 
Result so far: 97.0
The remainder is 12 after subtracting 630 from 642.
Grab the next digit (9) from the dividend, add it to 12, then carry on: 129 / 90

Let's proceed to step 5:
The number 90 fits into 129 1 times, leaving a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 971.0
The remainder is 39 after subtracting 90 from 129.
Take the next digit (6) from the dividend and append it to 39, then repeat: 396 / 90

Going ahead to step 6:
90 can be fit into 396 4 times, resulting in a remainder of 36.
Record the quotient 4 as the next digit in the result. 
Result so far: 9714.0
The remainder is 36 after subtracting 360 from 396.
Append the next digit (0) from the dividend to 36 and continue with: 360 / 90

Moving on to step 7:
360 divided by 90 is 4 with a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 97144.0
If we take 360 away from 360, we end up with 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 90

Step 8:
3 divided by 90 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 971440.0
Deduct 0 from 3 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 9:
30 divided by 90 is 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 971440.0
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 10:
90 goes into 300 3 times with a remainder of 30.
Record the quotient 3 as the next digit in the result. 
Result so far: 971440.03
If we subtract 270 from 300, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 11:
When dividing 300 by 90, we get 3 with a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 971440.033
If we take 270 away from 300, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

In conclusion, the division gives 971440.033 with a balance of 0.003.