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<http://schema.org/text>
"Use an online carpet calculator if you’d rather not do the math by hand. An online calculator can run the math equations for you, which may prove useful if you’re not confident in your math skills. Simply input the width and height of the number of stairs you’ll be carpeting. Hit the “calculate” key, and the calculator will give you the total area measurement.\nFind a carpet calculator online at: https://www.homeadvisor.com/r/carpet-calculator.\nFor another option in which you'll only need to input the width and number of your stairs, check out: https://www.improvenet.com/r/carpet-calculator."
<https://www.wikihow.com/Calculate-Carpet-on-Stairs>