##9668##
You can use the following diagram to understand the concept regarding the names of place values (ones, tens, hundreds, thousands, etc.). However, in your case, we will only be working with the ones, tens, hundreds, and thousands.
##1##. Start by working with the ones. If “one” means “##1##,” and you have ##18## of them, then multiply ##18## by ##1##.
##18xx1##
##=18##
##2##. Move onto the tens. If “ten” means “##10##,” and you have ##15## of them, then multiply ##15## by ##10##.
##15xx10##
##=150##
##3##. Move onto the hundreds. If “hundred” means “##100##,” and you have ##15## of them, then multiply ##15## by ##100##.
##15xx100##
##=1500##
##4##. Move onto the thousands. If “thousand” means “##1000##,” and you have ##8## of them, then multiply ##8## by ##1000##.
##8xx1000##
##=8000##
##5##. Add the four products together to determine the number.
##8000+1500+150+18##
##=9500+150+18##
##=9650+18##
##=color(green)(|bar(ul(color(white)(a/a)9668color(white)(a/a)|)))##
