Xinhua Bookstore shipped 400 children's story books, sold 20% of them on the first day, and sold 150% of the sales on the second day. How many books are left in the bookstore?
新华书店运来400本儿童故事书，第一天卖了20%，第二天卖的相当于第一天卖的150%，书店还剩多少本书没有卖？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">400 * (1/5)</gadget>
<output>80</output>

<gadget id="calculator">150 / 100</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">400 * (1/5) * (3/2)</gadget>
<output>120</output>

<gadget id="calculator">400 - 80 - 120</gadget>
<output>200</output>

<result>200</result>