Xiaofang has participated in 5 math tests with a full score of 100, and her average score is 90 points. How much will Xiaofang's scores in each math test not be lower than?
小芳参加了5次满分为100分的数学测验，其平均分是90分，请问小芳的每次数学测验成绩不会低过多少分？
<gadget id="calculator">100 * 5</gadget>
<output>500</output>

<gadget id="calculator">90 * 5</gadget>
<output>450</output>

<gadget id="calculator">500 - 450</gadget>
<output>50</output>

<result>50</result>