Dad's bookshelf has 11 floors, and each floor can hold up to 15 books. How many books can this bookshelf hold at most?
爸爸的书架有11层，每层最多可放15本书，这个书架最多能放多少本．
<gadget id="calculator">15 * 11</gadget>
<output>165</output>

<result>165</result>