528 students from Guangming Primary School were divided into 4 batches to visit the "National Youth Aeromodelling Exhibition". The first three batches each went to 146 people, and how many people went to the last batch?
光明小学528名同学分4批去参观"全国青少年航模展"，前三批每批去了146人，最后一批去了多少人？
<gadget id="calculator">146 * 3</gadget>
<output>438</output>

<gadget id="calculator">528 - 438</gadget>
<output>90</output>

<result>90</result>