The Happy Lantern Factory plans to produce 400 lanterns in three days. It produced 146 lanterns on the first day and 154 lanterns on the second day. How many lanterns need to be produced on the third day to complete the task?
快乐灯笼厂计划在三天内生产灯笼400个，第一天生产了146个，第二天生产了154个，第三天需要生产多少个灯笼才能完成任务？
<gadget id="calculator">400 - 146 - 154</gadget>
<output>100</output>

<result>100</result>