121858 divided by 16 
We want to divide 121858 by 16.

Step 1:
If we divide 1 by 16, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 16

Step 2:
The number 16 fits into 12 0 times, leaving a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Fetch the next digit (1) from the dividend, attach it to 12 and continue: 121 / 16

Going ahead to step 3:
The number 16 fits into 121 7 times, leaving a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Deduct 112 from 121 and we're left with 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 16

Advancing to step 4:
The number 16 fits into 98 6 times, leaving a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 76.0
If we take 96 away from 98, we end up with 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 16

Moving on to step 5:
16 goes into 25 1 times with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 761.0
If we subtract 16 from 25, we get 9.
Bring next digit (8) of the dividend behind the 9 and repeat the process: 98 / 16

Going ahead to step 6:
The number 16 fits into 98 6 times, leaving a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 7616.0
Subtract 96 from 98 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 7:
The number 16 fits into 20 1 times, leaving a remainder of 4.
Record the quotient 1 as the next digit in the result. 
Result so far: 7616.1
Subtracting 16 from 20 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 8:
40 divided by 16 is 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 7616.12
If we subtract 32 from 40, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 9:
The number 16 fits into 80 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 7616.125
Subtracting 80 from 80 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 10:
If we divide 0 by 16, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 7616.125
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 11:
If we divide 0 by 16, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 7616.125
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 7616.125, with a leftover of 0.0.