It is planned to paint 3 rooms every day, which can be completed in 8 days, but actually 4 rooms are painted every day. How many days can it actually be done?
计划每天粉刷3间，8天可以完成，实际每天粉刷4间．实际多少天可以完成？
<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>