{"product_id":"2940046039733","title":"The Marmo Method Modelbuilding Guide #3: Understanding Model Math \u0026 Scale Jumping","description":"\u003cp\u003eAn essential guide to understanding scale model math. Learn about ratio and proportion, use simple multiplication factors to upscale and downscale models, find out how Marmo's Three Laws take the mystery out of scale calculations and more.\u003c\/p\u003e","brand":"Rincom Productions","offers":[{"title":"Default Title","offer_id":47110535741680,"sku":"2940046039733","price":2.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/2940046039733_p0.jpg?v=1763687645","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/2940046039733","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}