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There are thousands of calculators out there; we can't possibly help you without knowing which one you have. Please add the brand and model of your calculator. Can you elaborate on what you mean by the "check button"? Is that an actual button on the phone that says "check", or is it something like the equal sign that gives you the answer?
There are thousands of calculators out there; we can't possibly help you without knowing which one you have. Please add the brand and model of your calculator. Can you elaborate on what you mean by the "check button"? Is that an actual button on the phone that says "check", or is it something like the equal sign that gives you the answer?
by Jerry Wheeler