Write a multiplication equation with one variable and one fraction that has the solution 8

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Extra points! find the missing dimension! need asap

Ineed with the quizzes in apex mathematics ii