Teacher Li bought 5 boxes of pencils, each box contains 20 boxes, and each box contains 8 pencils. How many pencils did Teacher Li buy in total?
李老师买来5箱铅笔，每箱有20盒，每盒有8支铅笔，李老师一共买来多少支铅笔？
<gadget id="calculator">8 * 20 * 5</gadget>
<output>800</output>

<result>800</result>