Guangming Primary School has 46 students in April 1, 42 in April 2, 44 in April 3, and 48 in April 4. When these students visit the "Science and Technology Exhibition Hall", every 30 people enter the hall in batches. How many batches do they need to enter the hall in total?
光明小学四一46人，四二42人，四三44人，四四48人．这些学生在参观"科技展览馆"时，每30人一批进馆，一共需要分几批进馆？
<gadget id="calculator">46 + 42 + 44 + 48</gadget>
<output>180</output>

<gadget id="calculator">180 / 30</gadget>
<output>6</output>

<result>6</result>