Xinhua Bookstore received a new batch of 400 children's books in December. They sold 3/8 of the total in the first week and 40% of the total in the second day. How many books are left?
新华书店十二月份新到一批儿童读物共400本，第一周卖出总数的(3/8)，第二天卖出总数的40%，还余下多少本？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (3/8) - (2/5)</gadget>
<output>9/40 = around 0.225</output>

<gadget id="calculator">400 * (9/40)</gadget>
<output>90</output>

<result>90</result>