Each purple book has 230 pages. Each orange book contains 510 pages. Mirella read 5 purple books and 4 orange books. How many more orange pages did she read than purple pages?
Purple = 5 * 230 = <T>multiply(5, 230)=1150 pages
Orange = 4 * 510 = <T>multiply(4, 510)=2040 pages
2040 - 1150 = <T>subtract(2040, 1150)=890
Mirella read 890 more orange pages than purple pages.
