16456438 ÷ 388 
We want to figure out the number of times 16456438 can be divided by 388.

Going ahead to step 1:
1 divided by 388 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 388

Step 2:
16 divided by 388 is 0 with a remainder of 16.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 16 to get 16.
Include the next digit (4) from the dividend after 16, then repeat: 164 / 388

On to step 3:
388 can be fit into 164 0 times, resulting in a remainder of 164.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 164 after subtracting 0 from 164.
Append the next digit (5) from the dividend to 164 and continue with: 1645 / 388

Going ahead to step 4:
When dividing 1645 by 388, we get 4 with a remainder of 93.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we subtract 1552 from 1645, we get 93.
Grab the next digit (6) from the dividend, add it to 93, then carry on: 936 / 388

Advancing to step 5:
936 divided by 388 is 2 with a remainder of 160.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
Deduct 776 from 936 and we're left with 160.
Grab the next digit (4) from the dividend, add it to 160, then carry on: 1604 / 388

Let's proceed to step 6:
The number 388 fits into 1604 4 times, leaving a remainder of 52.
The next digit of our result is 4. 
Result so far: 424.0
Deduct 1552 from 1604 and we're left with 52.
Grab the next digit (3) from the dividend, add it to 52, then carry on: 523 / 388

Step 7:
If we divide 523 by 388, we get 1 and a remainder of 135.
Put 1 as the next digit of the answer. 
Result so far: 4241.0
If we subtract 388 from 523, we get 135.
Include the next digit (8) from the dividend after 135, then repeat: 1358 / 388

Let's proceed to step 8:
If we divide 1358 by 388, we get 3 and a remainder of 194.
The number 3 becomes the next digit in our result. 
Result so far: 42413.0
Deduct 1164 from 1358 and we're left with 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Let's proceed to step 9:
When dividing 1940 by 388, we get 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 42413.5
Subtract 1940 from 1940 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.

Advancing to step 10:
388 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 42413.5
If we take 0 away from 0, we end up 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 388, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 42413.5
Subtracting 0 from 0 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.

The final outcome is 42413.5, with a leftover of 0.0.