During the creation of Sanitary City, there were 51 students in Class 1 of Grade 4, and each person picked up 6 plastic bags on average. There were 47 students in Class 2 of Grade 4, and each person picked up 5 plastic bags on average. How many plastic bags did the two classes pick up in total?
创卫生城期间，四年级一班51人，平均每人捡拾塑料袋6个，四年级2班有47人，平均每人捡拾塑料袋5个．两个班一共捡拾塑料袋多少个？
<gadget id="calculator">6 * 51</gadget>
<output>306</output>

<gadget id="calculator">5 * 47</gadget>
<output>235</output>

<gadget id="calculator">306 + 235</gadget>
<output>541</output>

<result>541</result>