Hualian Supermarket purchased 15 cartons of milk at a price of 34 yuan per carton, and bought 34 pieces of Wanglaoji at a price of 85 yuan each. How much more did the purchased Wanglaoji cost than the purchased milk?
华联超市购进15箱牛奶，每箱进价34元，有购进了王老吉34件，每件进价85元，购进的王老吉比购进的牛奶多用了多多少元？
<gadget id="calculator">85 * 34</gadget>
<output>2_890</output>

<gadget id="calculator">34 * 15</gadget>
<output>510</output>

<gadget id="calculator">2_890 - 510</gadget>
<output>2_380</output>

<result>2_380</result>