# Calculator project operator precedence question

In the example codepen project link for the javascript Calculator project, if you enter `4+4*10` the result is `80`! Without parentheses, multiplication has precedence over addition, so `4+4*10` is `44`, correct? Currently, my Calculator works according to what I think is the ‘normal’ operator precedence, given that we don’t have parentheses.
Should I change this so that it works like the example project on codepen? I really think the codepen example is wrong. What should I do?
-Ben

I have seen it done both ways. The 4 + 4 * 10 = 80 is a throwback to handheld calculators that worked like that; sequentially like adding machines. But I’ve also seen folks building the statement and then evaluating it which accounts for precedence and gives you 44.

I did mine the first way,since the overall intent seemed to be to emulate an old fashioned hand calculator.

But I think the way the stories are written it’s open to some interpretation. It’s a good question to ask. In the end if you make a decision and learn to implement it then I think the spirit of the challenge is met. That’s no more than one personal opinion.

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Thanks! I was worried, because one of the user stories is: “I can keep chaining mathematical operations together until I hit the equal button, and the calculator will tell me the correct output”. I was like, whoa, what’s “correct”, then
Thanks, again!
-Ben

Exactly! I had the same reaction