In the handicraft class, the teacher brought 16 pieces of red cardboard and 56 pieces of green cardboard, and distributed them to the students so that each group of students got the same number of red and green cardboards (just finished, no leftovers), How many groups of students can I assign at most?
手工课上老师带来了16张红卡纸和56张绿卡纸，要把它们搭配分给同学们，使每组同学分得红、绿卡纸的张数相同(正好分完，没有剩余)，最多能分给几组同学？
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<result>8</result>