In stock trading, the purchase must pay stamp duty at 0.3% of the turnover. Xiao Li buys 1000 shares of technology stocks at 10 yuan per share, how much stamp duty does he need to pay.
在股票交易中，买进必须按成交额的0.3%交纳印花税，小李以每股10元买进1000股科技股，需要交纳印花税多少元．
<gadget id="calculator">0.3 / 100</gadget>
<output>0.003</output>

<gadget id="calculator">10 * 1_000 * 0.003</gadget>
<output>30</output>

<result>30</result>