74738750 divided by 643 
We want to divide 74738750 by 643.

Step 1:
The number 643 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Bring next digit (4) of the dividend behind the 7 and repeat the process: 74 / 643

Let's proceed to step 2:
643 goes into 74 0 times with a remainder of 74.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 74, we end up with 74.
Fetch the next digit (7) from the dividend, attach it to 74 and continue: 747 / 643

Moving on to step 3:
When dividing 747 by 643, we get 1 with a remainder of 104.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 643 from 747 and we're left with 104.
Bring next digit (3) of the dividend behind the 104 and repeat the process: 1043 / 643

Going ahead to step 4:
643 goes into 1043 1 times with a remainder of 400.
The next digit of our result is 1. 
Result so far: 11.0
Subtract 643 from 1043 to get 400.
Bring next digit (8) of the dividend behind the 400 and repeat the process: 4008 / 643

Step 5:
4008 divided by 643 is 6 with a remainder of 150.
Record the quotient 6 as the next digit in the result. 
Result so far: 116.0
Deduct 3858 from 4008 and we're left with 150.
Append the next digit (7) from the dividend to 150 and continue with: 1507 / 643

Let's proceed to step 6:
When dividing 1507 by 643, we get 2 with a remainder of 221.
The next digit of our result is 2. 
Result so far: 1162.0
If we subtract 1286 from 1507, we get 221.
Grab the next digit (5) from the dividend, add it to 221, then carry on: 2215 / 643

Let's proceed to step 7:
2215 divided by 643 is 3 with a remainder of 286.
Record the quotient 3 as the next digit in the result. 
Result so far: 11623.0
If we take 1929 away from 2215, we end up with 286.
Include the next digit (0) from the dividend after 286, then repeat: 2860 / 643

Let's proceed to step 8:
The number 643 fits into 2860 4 times, leaving a remainder of 288.
Put 4 as the next digit of the answer. 
Result so far: 116234.0
The remainder is 288 after subtracting 2572 from 2860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Moving on to step 9:
When dividing 2880 by 643, we get 4 with a remainder of 308.
The next digit of our result is 4. 
Result so far: 116234.4
Subtracting 2572 from 2880 leaves us with 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

Going ahead to step 10:
When dividing 3080 by 643, we get 4 with a remainder of 508.
Record the quotient 4 as the next digit in the result. 
Result so far: 116234.44
Subtracting 2572 from 3080 leaves us with 508.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

The final outcome is 116234.44, with a leftover of 0.508.