The school bought a batch of brooms, and Mr. Li wanted to distribute them to 15 classes in the school on average. If each class was divided into 6 brooms, 5 brooms would not be enough. How many brooms did you buy?
学校买来一批扫把，李老师想平均分给全校15个班，如果每班分6把，还差5把不够分．买来的扫把是多少把？
<gadget id="calculator">6 * 15</gadget>
<output>90</output>

<gadget id="calculator">90 - 5</gadget>
<output>85</output>

<result>85</result>