7843470 divided by 421 
We want to divide 7843470 by 421.

Advancing to step 1:
When dividing 7 by 421, we get 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 421

Going ahead to step 2:
78 divided by 421 is 0 with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 78 leaves us with 78.
Bring next digit (4) of the dividend behind the 78 and repeat the process: 784 / 421

Going ahead to step 3:
421 goes into 784 1 times with a remainder of 363.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 421 from 784, we get 363.
Grab the next digit (3) from the dividend, add it to 363, then carry on: 3633 / 421

Advancing to step 4:
421 can be fit into 3633 8 times, resulting in a remainder of 265.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
Subtract 3368 from 3633 to get 265.
Grab the next digit (4) from the dividend, add it to 265, then carry on: 2654 / 421

Moving on to step 5:
When dividing 2654 by 421, we get 6 with a remainder of 128.
The next digit of our result is 6. 
Result so far: 186.0
If we take 2526 away from 2654, we end up with 128.
Append the next digit (7) from the dividend to 128 and continue with: 1287 / 421

Moving on to step 6:
421 goes into 1287 3 times with a remainder of 24.
The next digit of our result is 3. 
Result so far: 1863.0
If we subtract 1263 from 1287, we get 24.
Fetch the next digit (0) from the dividend, attach it to 24 and continue: 240 / 421

Step 7:
If we divide 240 by 421, we get 0 and a remainder of 240.
Use 0 as the next digit of our solution. 
Result so far: 18630.0
The remainder is 240 after subtracting 0 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Let's proceed to step 8:
421 goes into 2400 5 times with a remainder of 295.
The number 5 becomes the next digit in our result. 
Result so far: 18630.5
If we take 2105 away from 2400, we end up with 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

Going ahead to step 9:
421 goes into 2950 7 times with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 18630.57
If we take 2947 away from 2950, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 10:
When dividing 30 by 421, we get 0 with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 18630.57
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 11:
The number 421 fits into 300 0 times, leaving a remainder of 300.
The next digit of our result is 0. 
Result so far: 18630.57
Subtract 0 from 300 to get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

The final outcome is 18630.57, with a leftover of 0.003.