The only caveat for using the less-than operator is to make sure that the number inside the brackets is larger than the number at the end of the formula.
Nanị ọgbaghara maka iji ihe na-erughị onye ọrụ bụ iji jide n'aka na ọnụ ọgụgụ dị n'ime brackets bụ ibu karịa nọmba ahụ na njedebe nke usoro.