Mr. Zhang bought 35 bags of feed at the store at a unit price of 65 yuan per bag. After searching on the Internet, I found that if you buy directly from the manufacturer, you only need 57 yuan per bag. How much money did Mr. Zhang spend in total?
张先生以每袋65元的单价在商店买了35袋饲料．上网搜索后发现，如果从厂家直接购货，每袋只需57元．张先生一共多花了多少钱．
<gadget id="calculator">65 * 35</gadget>
<output>2_275</output>

<gadget id="calculator">57 * 35</gadget>
<output>1_995</output>

<gadget id="calculator">2_275 - 1_995</gadget>
<output>280</output>

<result>280</result>