There are 50 watercolor paintings, oil paintings are watercolor paintings (3/5), how many oil paintings are there?
水彩画有50幅，油画是水彩画的(3/5)，油画有几幅？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">50 * (3/5)</gadget>
<output>30</output>

<result>30</result>