We look at the division of 37500186 by 521 
We're looking to find how many times 521 goes into 37500186.

Step 1:
521 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Take the next digit (7) from the dividend and append it to 3, then repeat: 37 / 521

Advancing to step 2:
37 divided by 521 is 0 with a remainder of 37.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 37 after subtracting 0 from 37.
Take the next digit (5) from the dividend and append it to 37, then repeat: 375 / 521

Moving on to step 3:
375 divided by 521 is 0 with a remainder of 375.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 375, we end up with 375.
Append the next digit (0) from the dividend to 375 and continue with: 3750 / 521

On to step 4:
When dividing 3750 by 521, we get 7 with a remainder of 103.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtract 3647 from 3750 to get 103.
Include the next digit (0) from the dividend after 103, then repeat: 1030 / 521

Advancing to step 5:
If we divide 1030 by 521, we get 1 and a remainder of 509.
Use 1 as the next digit of our solution. 
Result so far: 71.0
If we take 521 away from 1030, we end up with 509.
Append the next digit (1) from the dividend to 509 and continue with: 5091 / 521

Going ahead to step 6:
If we divide 5091 by 521, we get 9 and a remainder of 402.
Record the quotient 9 as the next digit in the result. 
Result so far: 719.0
If we subtract 4689 from 5091, we get 402.
Fetch the next digit (8) from the dividend, attach it to 402 and continue: 4028 / 521

Going ahead to step 7:
When dividing 4028 by 521, we get 7 with a remainder of 381.
Use 7 as the next digit of our solution. 
Result so far: 7197.0
Subtracting 3647 from 4028 leaves us with 381.
Append the next digit (6) from the dividend to 381 and continue with: 3816 / 521

Going ahead to step 8:
When dividing 3816 by 521, we get 7 with a remainder of 169.
Use 7 as the next digit of our solution. 
Result so far: 71977.0
If we subtract 3647 from 3816, we get 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

On to step 9:
The number 521 fits into 1690 3 times, leaving a remainder of 127.
The next digit of our result is 3. 
Result so far: 71977.3
Subtract 1563 from 1690 to get 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

Going ahead to step 10:
1270 divided by 521 is 2 with a remainder of 228.
The next digit of our result is 2. 
Result so far: 71977.32
The remainder is 228 after subtracting 1042 from 1270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Let's proceed to step 11:
521 can be fit into 2280 4 times, resulting in a remainder of 196.
Write down 4 as next digit of the result. 
Result so far: 71977.324
Subtract 2084 from 2280 to get 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Going ahead to step 12:
521 goes into 1960 3 times with a remainder of 397.
The next digit of our result is 3. 
Result so far: 71977.3243
If we subtract 1563 from 1960, we get 397.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

Going ahead to step 13:
521 can be fit into 3970 7 times, resulting in a remainder of 323.
Put 7 as the next digit of the answer. 
Result so far: 71977.32437
If we take 3647 away from 3970, we end up with 323.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3230, and continue the process.

Moving on to step 14:
If we divide 3230 by 521, we get 6 and a remainder of 104.
Record the quotient 6 as the next digit in the result. 
Result so far: 71977.324376
Deduct 3126 from 3230 and we're left with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Step 15:
If we divide 1040 by 521, we get 1 and a remainder of 519.
The next digit of our result is 1. 
Result so far: 71977.3243761
Deduct 521 from 1040 and we're left with 519.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5190, and continue the process.

Step 16:
521 can be fit into 5190 9 times, resulting in a remainder of 501.
Record the quotient 9 as the next digit in the result. 
Result so far: 71977.32437619
Deduct 4689 from 5190 and we're left with 501.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5010, and continue the process.

The final result is 71977.32437619 with a remainder of 5.01e-07.