500 grams of "Fujian Tieguanyin" tea is priced at 200 yuan. During the Spring Festival, "Quanyan Tea Shop" will give away 50 grams for every 500 grams sold. Uncle Li weighed 1.5 kilograms of tea, how much should he pay?
"福建铁观音"茶叶500克售价200元，春节期间，"泉岩茶店"每卖500克赠送50克．李叔叔称了1.5千克茶叶，他应付多少钱？
<gadget id="calculator">200 / 500</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1.5 * 1_000</gadget>
<output>1_500</output>

<gadget id="calculator">50 * 2</gadget>
<output>100</output>

<gadget id="calculator">1_500 - 100</gadget>
<output>1_400</output>

<gadget id="calculator">(2/5) * 1_400</gadget>
<output>560</output>

<result>560</result>