The number B is 4, and the number A is 5 times the reciprocal of the number B. What is the product of the number A and the number B?
乙数是4，甲数是乙数的倒数的5倍，甲数与乙数的积是多少？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 5 * 4</gadget>
<output>5</output>

<result>5</result>