The fourth grade is going to buy gifts for Children's Day, and I will buy them for 4 classes, 80 yuan per class, and 100 yuan to buy gifts for group gardening programs. How much do you need in total?
四年级准备买六一礼物，买给4个班，每班80元，还需要100元买集体游园节目的礼物．一共需要多少钱？
<gadget id="calculator">80 * 4</gadget>
<output>320</output>

<gadget id="calculator">320 + 100</gadget>
<output>420</output>

<result>420</result>