The farm conducted a germination test of a batch of seeds, and the result was that the germination rate was 98%, and only 20 seeds did not germinate. How many seeds are there in this batch?
农场作了一批种子发芽试验，结果发芽率是98%，只有20粒没有发芽，这批种子共有多少粒？
<result>100</result>