A class of 5th grade has 43 students learning to cut flowers. It takes 3 minutes for each person to learn how to cut flowers. If the whole class can learn how to cut flowers, how many minutes will it take at least.
五年级一班共有43人学习剪花，每教会一人需要3分钟，全班同学都学会，至少需要多少分钟．
<result>6</result>