There are 1 cent, 2 cents, and 5 cents in the savings box. The ratio of their numbers is 1:7:21. What is the total number of coins in the savings box?
储蓄箱中存有1分，2分，5分三种硬币，它们的个数之比为1：7：21，储蓄箱中总钱数可能是多少分．
<result>360</result>