The number A is the reciprocal of the number B. After moving the decimal point of the number A to the left, it is 0.24. What is the number B?
甲数是乙数倒数，甲数的小数点向左移动一位以后是0.24，乙数是多少？
<gadget id="calculator">0.24 * 10</gadget>
<output>2.4</output>

<gadget id="calculator">1 / 2.4</gadget>
<output>0.416667</output>

<result>0.416667</result>