90153219 ÷ 394 
We want to divide 90153219 by 394.

Step 1:
When dividing 9 by 394, we get 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 394

Step 2:
394 goes into 90 0 times with a remainder of 90.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 90 leaves us with 90.
Fetch the next digit (1) from the dividend, attach it to 90 and continue: 901 / 394

Advancing to step 3:
The number 394 fits into 901 2 times, leaving a remainder of 113.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 788 away from 901, we end up with 113.
Grab the next digit (5) from the dividend, add it to 113, then carry on: 1135 / 394

On to step 4:
When dividing 1135 by 394, we get 2 with a remainder of 347.
The next digit of our result is 2. 
Result so far: 22.0
Subtract 788 from 1135 to get 347.
Include the next digit (3) from the dividend after 347, then repeat: 3473 / 394

Step 5:
If we divide 3473 by 394, we get 8 and a remainder of 321.
Use 8 as the next digit of our solution. 
Result so far: 228.0
Deduct 3152 from 3473 and we're left with 321.
Append the next digit (2) from the dividend to 321 and continue with: 3212 / 394

On to step 6:
394 can be fit into 3212 8 times, resulting in a remainder of 60.
Use 8 as the next digit of our solution. 
Result so far: 2288.0
Subtracting 3152 from 3212 leaves us with 60.
Append the next digit (1) from the dividend to 60 and continue with: 601 / 394

Going ahead to step 7:
When dividing 601 by 394, we get 1 with a remainder of 207.
Use 1 as the next digit of our solution. 
Result so far: 22881.0
Deduct 394 from 601 and we're left with 207.
Append the next digit (9) from the dividend to 207 and continue with: 2079 / 394

On to step 8:
If we divide 2079 by 394, we get 5 and a remainder of 109.
The number 5 becomes the next digit in our result. 
Result so far: 228815.0
Deduct 1970 from 2079 and we're left with 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

Advancing to step 9:
The number 394 fits into 1090 2 times, leaving a remainder of 302.
Use 2 as the next digit of our solution. 
Result so far: 228815.2
Subtracting 788 from 1090 leaves us with 302.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3020, and continue the process.

On to step 10:
394 can be fit into 3020 7 times, resulting in a remainder of 262.
The number 7 becomes the next digit in our result. 
Result so far: 228815.27
Subtract 2758 from 3020 to get 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

On to step 11:
If we divide 2620 by 394, we get 6 and a remainder of 256.
Record the quotient 6 as the next digit in the result. 
Result so far: 228815.276
Deduct 2364 from 2620 and we're left with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Moving on to step 12:
394 goes into 2560 6 times with a remainder of 196.
Put 6 as the next digit of the answer. 
Result so far: 228815.2766
Subtracting 2364 from 2560 leaves us with 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

The final outcome is 228815.2766, with a leftover of 0.00196.