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Froggy Mechanical Calculator

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    📐 This mechanical calculator operates using a planar hinge mechanism involving symmetrical isosceles right-angled triangles. The hypotenuses of these triangles slide along number lines, while their vertices are connected, forming a hinged rhombus. By placing the sliding points on different integers, the calculator determines the midpoint of these integers to display the results.

    This model is based on the expired “educated monkey” patent from 1915.

    🎁It's a perfect gift for your friends & family!

    Click on "ADD TO CART" to get yours now!

    We will resume the original price tomorrow


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    💰 Payment Method

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    Worldwide Shipping 

    Please do note that shipping is insured. However, you may receive your items earlier. Tracking Numbers will ALWAYS be sent so you can track it every step of the way! Cool things are worth waiting for! 😉

     
    OUR GUARANTEE

    📦 Insured Worldwide Shipping: Each order includes real-time tracking details and insurance coverage in the unlikely event that a package gets lost or stolen in transit.

    💰 Money-Back Guarantee: If your items arrive damaged or become defective within 15 days of normal usage, we will gladly issue out a replacement or refund.

    ✉️ 24/7 Customer Support: We have a team of live reps ready to help and answer any questions you have within a 24-hour time frame, 7 days a week.

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