42109961 divided by 428 
We want to figure out the number of times 42109961 can be divided by 428.

On to step 1:
428 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 428

Advancing to step 2:
When dividing 42 by 428, we get 0 with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Fetch the next digit (1) from the dividend, attach it to 42 and continue: 421 / 428

Going ahead to step 3:
If we divide 421 by 428, we get 0 and a remainder of 421.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 421 and we're left with 421.
Bring next digit (0) of the dividend behind the 421 and repeat the process: 4210 / 428

Step 4:
428 goes into 4210 9 times with a remainder of 358.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we take 3852 away from 4210, we end up with 358.
Fetch the next digit (9) from the dividend, attach it to 358 and continue: 3589 / 428

On to step 5:
428 goes into 3589 8 times with a remainder of 165.
Write down 8 as next digit of the result. 
Result so far: 98.0
Subtracting 3424 from 3589 leaves us with 165.
Take the next digit (9) from the dividend and append it to 165, then repeat: 1659 / 428

Step 6:
428 goes into 1659 3 times with a remainder of 375.
Write down 3 as next digit of the result. 
Result so far: 983.0
Subtracting 1284 from 1659 leaves us with 375.
Take the next digit (6) from the dividend and append it to 375, then repeat: 3756 / 428

On to step 7:
428 goes into 3756 8 times with a remainder of 332.
Write down 8 as next digit of the result. 
Result so far: 9838.0
The remainder is 332 after subtracting 3424 from 3756.
Include the next digit (1) from the dividend after 332, then repeat: 3321 / 428

Moving on to step 8:
If we divide 3321 by 428, we get 7 and a remainder of 325.
Put 7 as the next digit of the answer. 
Result so far: 98387.0
If we subtract 2996 from 3321, we get 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

On to step 9:
The number 428 fits into 3250 7 times, leaving a remainder of 254.
Use 7 as the next digit of our solution. 
Result so far: 98387.7
If we take 2996 away from 3250, we end up with 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Advancing to step 10:
When dividing 2540 by 428, we get 5 with a remainder of 400.
The next digit of our result is 5. 
Result so far: 98387.75
If we take 2140 away from 2540, we end up with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

On to step 11:
When dividing 4000 by 428, we get 9 with a remainder of 148.
Use 9 as the next digit of our solution. 
Result so far: 98387.759
Subtracting 3852 from 4000 leaves us with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Moving on to step 12:
1480 divided by 428 is 3 with a remainder of 196.
Put 3 as the next digit of the answer. 
Result so far: 98387.7593
If we subtract 1284 from 1480, we get 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Advancing to step 13:
When dividing 1960 by 428, we get 4 with a remainder of 248.
The next digit of our result is 4. 
Result so far: 98387.75934
Subtracting 1712 from 1960 leaves us with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

On to step 14:
When dividing 2480 by 428, we get 5 with a remainder of 340.
The next digit of our result is 5. 
Result so far: 98387.759345
If we subtract 2140 from 2480, we get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Moving on to step 15:
When dividing 3400 by 428, we get 7 with a remainder of 404.
The next digit of our result is 7. 
Result so far: 98387.7593457
Deduct 2996 from 3400 and we're left with 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

Step 16:
The number 428 fits into 4040 9 times, leaving a remainder of 188.
Record the quotient 9 as the next digit in the result. 
Result so far: 98387.75934579
If we take 3852 away from 4040, we end up with 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

The final outcome is 98387.75934579, with a leftover of 1.88e-07.