The average of the numbers A and B is 42.5, and the sum of the two numbers divided by the number C is 0.16. What is the number C?
甲、乙两数的平均数是42.5，两数之和除以丙数后是0.16，丙数是多少？
<gadget id="calculator">2 / 0.16</gadget>
<output>12.5</output>

<gadget id="calculator">42.5 * 12.5</gadget>
<output>531.25</output>

<result>531.25</result>