Let's divide 23103990 by 428
We want to figure out the number of times 23103990 can be divided by 428.

Going ahead to step 1:
When dividing 2 by 428, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Include the next digit (3) from the dividend after 2, then repeat: 23 / 428

Moving on to step 2:
428 goes into 23 0 times with a remainder of 23.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 23, we get 23.
Fetch the next digit (1) from the dividend, attach it to 23 and continue: 231 / 428

On to step 3:
When dividing 231 by 428, we get 0 with a remainder of 231.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 231, we end up with 231.
Take the next digit (0) from the dividend and append it to 231, then repeat: 2310 / 428

Going ahead to step 4:
The number 428 fits into 2310 5 times, leaving a remainder of 170.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Deduct 2140 from 2310 and we're left with 170.
Append the next digit (3) from the dividend to 170 and continue with: 1703 / 428

On to step 5:
When dividing 1703 by 428, we get 3 with a remainder of 419.
Record the quotient 3 as the next digit in the result. 
Result so far: 53.0
If we take 1284 away from 1703, we end up with 419.
Bring next digit (9) of the dividend behind the 419 and repeat the process: 4199 / 428

Let's proceed to step 6:
4199 divided by 428 is 9 with a remainder of 347.
Write down 9 as next digit of the result. 
Result so far: 539.0
Subtract 3852 from 4199 to get 347.
Fetch the next digit (9) from the dividend, attach it to 347 and continue: 3479 / 428

Going ahead to step 7:
When dividing 3479 by 428, we get 8 with a remainder of 55.
Put 8 as the next digit of the answer. 
Result so far: 5398.0
If we take 3424 away from 3479, we end up with 55.
Grab the next digit (0) from the dividend, add it to 55, then carry on: 550 / 428

Advancing to step 8:
The number 428 fits into 550 1 times, leaving a remainder of 122.
Put 1 as the next digit of the answer. 
Result so far: 53981.0
Deduct 428 from 550 and we're left with 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Let's proceed to step 9:
428 can be fit into 1220 2 times, resulting in a remainder of 364.
Put 2 as the next digit of the answer. 
Result so far: 53981.2
If we take 856 away from 1220, we end up with 364.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

Step 10:
428 goes into 3640 8 times with a remainder of 216.
Record the quotient 8 as the next digit in the result. 
Result so far: 53981.28
If we take 3424 away from 3640, we end up with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Let's proceed to step 11:
2160 divided by 428 is 5 with a remainder of 20.
The next digit of our result is 5. 
Result so far: 53981.285
Subtract 2140 from 2160 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 12:
If we divide 200 by 428, we get 0 and a remainder of 200.
The next digit of our result is 0. 
Result so far: 53981.285
Deduct 0 from 200 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 13:
When dividing 2000 by 428, we get 4 with a remainder of 288.
The number 4 becomes the next digit in our result. 
Result so far: 53981.28504
Deduct 1712 from 2000 and we're left with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

On to step 14:
The number 428 fits into 2880 6 times, leaving a remainder of 312.
Put 6 as the next digit of the answer. 
Result so far: 53981.285046
Deduct 2568 from 2880 and we're left with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Advancing to step 15:
The number 428 fits into 3120 7 times, leaving a remainder of 124.
The next digit of our result is 7. 
Result so far: 53981.2850467
Subtract 2996 from 3120 to get 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Advancing to step 16:
1240 divided by 428 is 2 with a remainder of 384.
Put 2 as the next digit of the answer. 
Result so far: 53981.28504672
Deduct 856 from 1240 and we're left with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

In conclusion, the division gives 53981.28504672 with a balance of 3.84e-07.