87090371 ÷ 672 
Our goal is to divide 87090371 by 672.

Step 1:
The number 672 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (7) from the dividend, add it to 8, then carry on: 87 / 672

Going ahead to step 2:
87 divided by 672 is 0 with a remainder of 87.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 87 leaves us with 87.
Include the next digit (0) from the dividend after 87, then repeat: 870 / 672

Step 3:
If we divide 870 by 672, we get 1 and a remainder of 198.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 198 after subtracting 672 from 870.
Include the next digit (9) from the dividend after 198, then repeat: 1989 / 672

Going ahead to step 4:
672 goes into 1989 2 times with a remainder of 645.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Subtracting 1344 from 1989 leaves us with 645.
Bring next digit (0) of the dividend behind the 645 and repeat the process: 6450 / 672

Going ahead to step 5:
672 can be fit into 6450 9 times, resulting in a remainder of 402.
The next digit of our result is 9. 
Result so far: 129.0
Subtract 6048 from 6450 to get 402.
Grab the next digit (3) from the dividend, add it to 402, then carry on: 4023 / 672

On to step 6:
When dividing 4023 by 672, we get 5 with a remainder of 663.
The next digit of our result is 5. 
Result so far: 1295.0
If we take 3360 away from 4023, we end up with 663.
Include the next digit (7) from the dividend after 663, then repeat: 6637 / 672

On to step 7:
672 goes into 6637 9 times with a remainder of 589.
Put 9 as the next digit of the answer. 
Result so far: 12959.0
If we take 6048 away from 6637, we end up with 589.
Bring next digit (1) of the dividend behind the 589 and repeat the process: 5891 / 672

Let's proceed to step 8:
The number 672 fits into 5891 8 times, leaving a remainder of 515.
The next digit of our result is 8. 
Result so far: 129598.0
If we subtract 5376 from 5891, we get 515.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5150, and continue the process.

On to step 9:
5150 divided by 672 is 7 with a remainder of 446.
Write down 7 as next digit of the result. 
Result so far: 129598.7
Subtracting 4704 from 5150 leaves us with 446.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4460, and continue the process.

On to step 10:
The number 672 fits into 4460 6 times, leaving a remainder of 428.
The next digit of our result is 6. 
Result so far: 129598.76
Subtract 4032 from 4460 to get 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

Advancing to step 11:
4280 divided by 672 is 6 with a remainder of 248.
The next digit of our result is 6. 
Result so far: 129598.766
If we subtract 4032 from 4280, we get 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

The final outcome is 129598.766, with a leftover of 0.0248.