Choose two different types of paintings from 3 Chinese paintings and 2 oil paintings to decorate the classroom. How many different methods are there?
从3幅国画、2幅油画中选取两幅不同类型的画布置教室，问有几种不同的选法．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>