Xiaoxiao has 30 story books, and the number of naughty story books is 15 less than Xiaoxiao's five times. How many story books does naughty have?
笑笑30本故事书，淘气有故事书本数比笑笑的5倍少15本，淘气有故事书多少本？
<gadget id="calculator">30 * 5</gadget>
<output>150</output>

<gadget id="calculator">150 - 15</gadget>
<output>135</output>

<result>135</result>