{"description":"\u3053\u3093\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u4f5c\u3063\u3066\u307f\u307e\u3059 require 'bigdecimal' Order = Struct.new(:sub_total) def total(order, tax) (BigDecimal(order.sub_total) * BigDecimal(tax.to_s)).ceil end order = Order.new(100) total(order, 1.08) # => 108 \u3067\u3082\u3001\u3053\u308c\u3058\u3083\u6bce\u56de\u6d88\u8cbb\u7a0e\u3092\u6e21\u3055\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u3088\u306d... \u5f15\u6570tax\u306b\u521d\u671f\u5024\u3092\u8a2d\u5b9a\u3057\u3066\u3042\u3052\u307e\u3057\u3087\u3046 require 'bigdecimal' Order = Struct.new(:sub_tota\u2026","author_url":"https://blog.hatena.ne.jp/murajun1978/","blog_url":"https://murajun1978.hatenadiary.com/","author_name":"murajun1978","title":"Ruby\u3067\u6d88\u8cbb\u7a0e\u306e\u8a08\u7b97\u3084\u3063\u3066\u307f\u305f\u30d8(^o^)\u30ce","url":"https://murajun1978.hatenadiary.com/entry/2014/09/21/193200","image_url":null,"blog_title":"Murajun's Style","version":"1.0","type":"rich","height":"190","width":"100%","categories":["Ruby"],"provider_name":"Hatena Blog","published":"2014-09-21 19:32:00","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmurajun1978.hatenadiary.com%2Fentry%2F2014%2F09%2F21%2F193200\" title=\"Ruby\u3067\u6d88\u8cbb\u7a0e\u306e\u8a08\u7b97\u3084\u3063\u3066\u307f\u305f\u30d8(^o^)\u30ce - Murajun&#39;s Style\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>"}