A factory needs to complete 800 pieces of handicrafts, the first month (3/8), and the rest in the second month. How many pieces need to be completed in the second month?
某厂要完成800件工艺品，第一个月完成(3/8)，其余的第二个月完成，第二个月需完成多少件？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">800 * (5/8)</gadget>
<output>500</output>

<result>500</result>