AD:
税込みの値段から、GSTの額を計算します。
GSTは10%です in 201802の時点で
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require 'bigdecimal' - original_price = 265.00 - tax = 1.1 - before_tax = (BigDecimal((original_price/tax).to_s).ceil(2).to_f) - gst = (BigDecimal((original_price - before_tax).to_s).floor(2).to_f) |
AD:
Ayumi Mizoshiri
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