Let's divide 90138688 by 419
We want to figure out the number of times 90138688 can be divided by 419.

Going ahead to step 1:
419 goes into 9 0 times with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 419

On to step 2:
When dividing 90 by 419, we get 0 with a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 90 after subtracting 0 from 90.
Include the next digit (1) from the dividend after 90, then repeat: 901 / 419

Step 3:
If we divide 901 by 419, we get 2 and a remainder of 63.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 838 away from 901, we end up with 63.
Append the next digit (3) from the dividend to 63 and continue with: 633 / 419

Moving on to step 4:
If we divide 633 by 419, we get 1 and a remainder of 214.
Write down 1 as next digit of the result. 
Result so far: 21.0
Subtract 419 from 633 to get 214.
Append the next digit (8) from the dividend to 214 and continue with: 2148 / 419

On to step 5:
The number 419 fits into 2148 5 times, leaving a remainder of 53.
Use 5 as the next digit of our solution. 
Result so far: 215.0
If we subtract 2095 from 2148, we get 53.
Grab the next digit (6) from the dividend, add it to 53, then carry on: 536 / 419

Let's proceed to step 6:
536 divided by 419 is 1 with a remainder of 117.
The number 1 becomes the next digit in our result. 
Result so far: 2151.0
Subtracting 419 from 536 leaves us with 117.
Take the next digit (8) from the dividend and append it to 117, then repeat: 1178 / 419

Moving on to step 7:
419 goes into 1178 2 times with a remainder of 340.
The number 2 becomes the next digit in our result. 
Result so far: 21512.0
Subtracting 838 from 1178 leaves us with 340.
Append the next digit (8) from the dividend to 340 and continue with: 3408 / 419

Step 8:
419 can be fit into 3408 8 times, resulting in a remainder of 56.
The next digit of our result is 8. 
Result so far: 215128.0
Subtracting 3352 from 3408 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 9:
560 divided by 419 is 1 with a remainder of 141.
Write down 1 as next digit of the result. 
Result so far: 215128.1
The remainder is 141 after subtracting 419 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

Let's proceed to step 10:
1410 divided by 419 is 3 with a remainder of 153.
Use 3 as the next digit of our solution. 
Result so far: 215128.13
If we subtract 1257 from 1410, we get 153.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

Let's proceed to step 11:
1530 divided by 419 is 3 with a remainder of 273.
Record the quotient 3 as the next digit in the result. 
Result so far: 215128.133
Deduct 1257 from 1530 and we're left with 273.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2730, and continue the process.

The final outcome is 215128.133, with a leftover of 0.0273.