A, B, C, and D go to a bookstore to buy books. It is known that A carries B’s money (4/5), and B’s money belongs to C (3/2). Ding carries 3 yuan more than A, and all four people carry one-yuan coins. More than 30 yuan per person. So how much money did B bring?
甲、乙、丙、丁四人到书店去买书．已知甲带的钱数是乙的(4/5)，乙带的钱数是丙的(3/2)，丁比甲多带3元，四人带的钱全是一元的硬币，平均每人30多元．则乙带了多少元．
<gadget id="calculator">15 * 3</gadget>
<output>45</output>

<result>45</result>