certain bookstore has a discount for customers, whoever buys more than 100 copies of the same kind of books will be charged 90% of the book price. A certain unit buys two kinds of books, A and B, in a bookstore. The number of books of type B is 3/5 of the number of books of type A. Only the book of type A gets a 90% discount. The amount of money is twice the total amount paid for buying a book of type B. It is known that each book of type B is priced at 1.5 yuan, so how much is the original price of each book of type A before the discount?
某书店对顾客有一项优惠，凡购买同种书百册以上，按书价90%收款．某单位到书店购买甲、乙两种书，其中乙种书的册数是甲种书册数的(3/5)，只有甲种书得到90%的优惠，这时买甲种书所付总钱数是买乙种书所付总钱数的2倍，己知乙种书每本定价是1.5元，那么优惠前甲种书每本原价是多少元？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1.8 / (9/10)</gadget>
<output>2</output>

<result>2</result>