Considering the different years of compulsory primary schools in different provinces in China, the following categories are discussed.

If there are five grades in Sunshine Primary School, the whole school has 172x5=860 students.

If Sunshine Primary School has six grades, the whole school has 172x6= 1032 students.

This kind of questions examines the knowledge points of multiplication in primary school mathematics. Be sure to analyze how many times a certain quantity should be multiplied or how many times it should be expanded. Take this problem as an example.

There are 43 students in one class, so the number of students in four classes in one grade is required. If addition is used, it is the sum of four 43, if multiplication is used, it is 4 times 43, and 172 students are obtained.