What value will you get for 4 plus 3 times 7 minus 10 divided by 2 on an arithmetic calculator?

Following the order of operations (PEMDAS/BODMAS), we calculate:

1. Multiplication and Division (from left to right): 3 * 7 = 21 and 10 / 2 = 5

2. Addition and Subtraction (from left to right): 4 + 21 - 5 = 20

Therefore, the answer is $\boxed{20}$.