99146890 ÷ 428 
We want to divide 99146890 by 428.

Step 1:
9 divided by 428 is 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 428

On to step 2:
When dividing 99 by 428, we get 0 with a remainder of 99.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 99 to get 99.
Bring next digit (1) of the dividend behind the 99 and repeat the process: 991 / 428

Let's proceed to step 3:
If we divide 991 by 428, we get 2 and a remainder of 135.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 856 from 991 to get 135.
Bring next digit (4) of the dividend behind the 135 and repeat the process: 1354 / 428

Advancing to step 4:
1354 divided by 428 is 3 with a remainder of 70.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
Subtract 1284 from 1354 to get 70.
Include the next digit (6) from the dividend after 70, then repeat: 706 / 428

Advancing to step 5:
428 can be fit into 706 1 times, resulting in a remainder of 278.
The number 1 becomes the next digit in our result. 
Result so far: 231.0
If we subtract 428 from 706, we get 278.
Bring next digit (8) of the dividend behind the 278 and repeat the process: 2788 / 428

Let's proceed to step 6:
The number 428 fits into 2788 6 times, leaving a remainder of 220.
Put 6 as the next digit of the answer. 
Result so far: 2316.0
Subtract 2568 from 2788 to get 220.
Include the next digit (9) from the dividend after 220, then repeat: 2209 / 428

Going ahead to step 7:
If we divide 2209 by 428, we get 5 and a remainder of 69.
Use 5 as the next digit of our solution. 
Result so far: 23165.0
If we take 2140 away from 2209, we end up with 69.
Take the next digit (0) from the dividend and append it to 69, then repeat: 690 / 428

Going ahead to step 8:
690 divided by 428 is 1 with a remainder of 262.
Write down 1 as next digit of the result. 
Result so far: 231651.0
The remainder is 262 after subtracting 428 from 690.
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 9:
The number 428 fits into 2620 6 times, leaving a remainder of 52.
Put 6 as the next digit of the answer. 
Result so far: 231651.6
If we take 2568 away from 2620, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 10:
When dividing 520 by 428, we get 1 with a remainder of 92.
Record the quotient 1 as the next digit in the result. 
Result so far: 231651.61
Deduct 428 from 520 and we're left with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

On to step 11:
The number 428 fits into 920 2 times, leaving a remainder of 64.
The next digit of our result is 2. 
Result so far: 231651.612
If we subtract 856 from 920, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 12:
640 divided by 428 is 1 with a remainder of 212.
Use 1 as the next digit of our solution. 
Result so far: 231651.6121
If we subtract 428 from 640, we get 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Advancing to step 13:
428 goes into 2120 4 times with a remainder of 408.
Put 4 as the next digit of the answer. 
Result so far: 231651.61214
The remainder is 408 after subtracting 1712 from 2120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Let's proceed to step 14:
4080 divided by 428 is 9 with a remainder of 228.
Record the quotient 9 as the next digit in the result. 
Result so far: 231651.612149
The remainder is 228 after subtracting 3852 from 4080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Let's proceed to step 15:
428 can be fit into 2280 5 times, resulting in a remainder of 140.
Write down 5 as next digit of the result. 
Result so far: 231651.6121495
Subtract 2140 from 2280 to get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

On to step 16:
1400 divided by 428 is 3 with a remainder of 116.
The next digit of our result is 3. 
Result so far: 231651.61214953
If we subtract 1284 from 1400, we get 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

The final result is 231651.61214953 with a remainder of 1.16e-07.