Tis a well spent penny that saves a groat. 善花一便土,节约四便土。
groat
[ noun ] a former English silver coin worth four pennies <noun.possession>
Groat \Groat\, n. [LG. gr[=o]te, orig., great, that is, a great piece of coin, larger than other coins in former use. See {Great}.] 1. An old English silver coin, equal to four pence.