The number A is (5/8), and the product of the number B and the number A is 1. What is the number B?
甲数是(5/8)，乙数与甲数的积是1，则乙数是多少．
<gadget id="calculator">8 / 5</gadget>
<output>8/5 = around 1.6</output>

<result>8/5 = around 1.6</result>