It costs 6 yuan to buy 2 bottles of drinks, how much is it to buy 19 bottles of drinks.
买2瓶饮料需6元，买19瓶饮料需要多少元．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 * 19</gadget>
<output>57</output>

<result>57</result>