It would equal 15. To get 15, you would first do 1*10= which equals 10. After that, you would add 5 to the 10 then there's your answer. I hoped this helped!
Let's assume you have supplement angle

Now when you talk about multiplication you can simply say...

And that will give you the answer.
1600m = 1600 ÷ 1000 = 1.6 km
Answer: 1.6 km
Lower Quartile-21
Upper Quartile-52
Interquartile Range- 31
Hope this helps !!