Write a brief response on how they solved the math problem

Problem 1: Chapter 1, Exercise 71 The problem asked me to convert 7.0 miles into kilometers. At first, I almost made it more complicated than it needed to be by thinking about converting into meters first, but then I realized the book already gave the conversion factor directly: 1 mile = 1.609 km. So I set it up like this: 7.0 milesx 1.609 km 1 mile=11.26 km7.0 \\, \\text{miles} \\times \\frac{1.609 \\, \\text{km}}{1 \\, \\text{mile}} = 11.26 \\, \\text{km}7.0milesx1mile 1.609km=11.26km Rounded to three significant figures, the final answer is 11.3 km. What helped me here was remembering to line up the units so "miles" cancel out, leaving kilometers. Once I did that, it clicked