A workshop has produced 637 teddy bears, which need to be packed in gift boxes. Each box contains 20 teddy bears, how many gift boxes are needed at least?
某车间生产了637只玩具小熊，需要装在礼盒中．每个盒子装20只玩具小熊，至少需要多少个礼盒？
<gadget id="calculator">31 + 1</gadget>
<output>32</output>

<result>32</result>