54240605 ÷ 840 
We want to divide 54240605 by 840.

Step 1:
840 can be fit into 5 0 times, resulting in a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 840

Let's proceed to step 2:
840 can be fit into 54 0 times, resulting in a remainder of 54.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 54, we get 54.
Grab the next digit (2) from the dividend, add it to 54, then carry on: 542 / 840

On to step 3:
840 can be fit into 542 0 times, resulting in a remainder of 542.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 542, we end up with 542.
Grab the next digit (4) from the dividend, add it to 542, then carry on: 5424 / 840

Advancing to step 4:
840 can be fit into 5424 6 times, resulting in a remainder of 384.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtract 5040 from 5424 to get 384.
Grab the next digit (0) from the dividend, add it to 384, then carry on: 3840 / 840

Going ahead to step 5:
840 can be fit into 3840 4 times, resulting in a remainder of 480.
Use 4 as the next digit of our solution. 
Result so far: 64.0
The remainder is 480 after subtracting 3360 from 3840.
Append the next digit (6) from the dividend to 480 and continue with: 4806 / 840

On to step 6:
840 goes into 4806 5 times with a remainder of 606.
The number 5 becomes the next digit in our result. 
Result so far: 645.0
Subtract 4200 from 4806 to get 606.
Fetch the next digit (0) from the dividend, attach it to 606 and continue: 6060 / 840

Let's proceed to step 7:
840 can be fit into 6060 7 times, resulting in a remainder of 180.
Write down 7 as next digit of the result. 
Result so far: 6457.0
Subtract 5880 from 6060 to get 180.
Append the next digit (5) from the dividend to 180 and continue with: 1805 / 840

Let's proceed to step 8:
1805 divided by 840 is 2 with a remainder of 125.
Use 2 as the next digit of our solution. 
Result so far: 64572.0
If we take 1680 away from 1805, we end up with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Moving on to step 9:
840 can be fit into 1250 1 times, resulting in a remainder of 410.
The next digit of our result is 1. 
Result so far: 64572.1
Deduct 840 from 1250 and we're left with 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Moving on to step 10:
When dividing 4100 by 840, we get 4 with a remainder of 740.
The number 4 becomes the next digit in our result. 
Result so far: 64572.14
If we take 3360 away from 4100, we end up with 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7400, and continue the process.

On to step 11:
7400 divided by 840 is 8 with a remainder of 680.
The number 8 becomes the next digit in our result. 
Result so far: 64572.148
Subtracting 6720 from 7400 leaves us with 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Advancing to step 12:
If we divide 6800 by 840, we get 8 and a remainder of 80.
Put 8 as the next digit of the answer. 
Result so far: 64572.1488
Subtract 6720 from 6800 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

After the division, we end up with 64572.1488 and a remainder of 0.0008.