Some kind of notebook, Xiao Wang bought 3 for 5.4 yuan. Small orchids are 9 yuan, how many can I buy?
某种笔记本，小王花5.4元，买了3个．小兰花9元，可买多少个？
<gadget id="calculator">5.4 / 3</gadget>
<output>1.8</output>

<gadget id="calculator">9 / 1.8</gadget>
<output>5</output>

<result>5</result>