The seventh sub-question on page 9 of the first volume of Mathematics in Grade Five published by People's Education Press should be like this.

This little problem is an application problem that is calculated by multiplication according to how many times a number is.

(1) What is the weight of this giant sequoia? Just multiply the weight of the blue whale by 18.7 to get the weight of the giant sequoia: 150xl8.7 = 2805 (ton).

(2) How many meters is the height of this giant fir, that is, the height of this giant fir can be obtained by multiplying the length of the blue whale by 3.2.

This application problem focuses on students' mastery of the calculation method of how many times one number is another.