There are 8 packs of copy paper in a box, and each pack has 500 sheets of paper. A company buys 7 boxes at a time. How many sheets of paper have they bought in total?
一箱复印纸有8包，每包有500张纸，某公司一次购买7箱，一共买了多少张纸？
<gadget id="calculator">500 * 8 * 7</gadget>
<output>28_000</output>

<result>28_000</result>