We're dividing 45378638 by 987 
We're looking to find how many times 987 goes into 45378638.

Moving on to step 1:
987 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
If we subtract 0 from 4, we get 4.
Take the next digit (5) from the dividend and append it to 4, then repeat: 45 / 987

Let's proceed to step 2:
45 divided by 987 is 0 with a remainder of 45.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 45 leaves us with 45.
Bring next digit (3) of the dividend behind the 45 and repeat the process: 453 / 987

On to step 3:
When dividing 453 by 987, we get 0 with a remainder of 453.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 453 leaves us with 453.
Bring next digit (7) of the dividend behind the 453 and repeat the process: 4537 / 987

Step 4:
987 can be fit into 4537 4 times, resulting in a remainder of 589.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 3948 from 4537 leaves us with 589.
Append the next digit (8) from the dividend to 589 and continue with: 5898 / 987

On to step 5:
The number 987 fits into 5898 5 times, leaving a remainder of 963.
Write down 5 as next digit of the result. 
Result so far: 45.0
The remainder is 963 after subtracting 4935 from 5898.
Fetch the next digit (6) from the dividend, attach it to 963 and continue: 9636 / 987

Moving on to step 6:
987 goes into 9636 9 times with a remainder of 753.
Write down 9 as next digit of the result. 
Result so far: 459.0
Subtract 8883 from 9636 to get 753.
Grab the next digit (3) from the dividend, add it to 753, then carry on: 7533 / 987

Step 7:
987 goes into 7533 7 times with a remainder of 624.
Use 7 as the next digit of our solution. 
Result so far: 4597.0
If we take 6909 away from 7533, we end up with 624.
Append the next digit (8) from the dividend to 624 and continue with: 6248 / 987

Step 8:
6248 divided by 987 is 6 with a remainder of 326.
The number 6 becomes the next digit in our result. 
Result so far: 45976.0
Deduct 5922 from 6248 and we're left with 326.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

On to step 9:
987 can be fit into 3260 3 times, resulting in a remainder of 299.
Record the quotient 3 as the next digit in the result. 
Result so far: 45976.3
If we take 2961 away from 3260, we end up with 299.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2990, and continue the process.

Going ahead to step 10:
If we divide 2990 by 987, we get 3 and a remainder of 29.
The number 3 becomes the next digit in our result. 
Result so far: 45976.33
Subtract 2961 from 2990 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

After the division, we end up with 45976.33 and a remainder of 0.029.