Xiaoli bought 3 identical notebooks and spent 18 yuan. If he bought 5 such notebooks, how much would it cost?
小力买了3个同样的笔记本，花了18元钱，如果他买了5本这样的笔记本，要花去多少钱？
<gadget id="calculator">18 / 3</gadget>
<output>6</output>

<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<result>30</result>