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 = <<5*230=1150>>1150 pages
Orange = 4 * 510 = <<4*510=2040>>2040 pages
2040 - 1150 = <<2040-1150=890>>890
Mirella read 890 more orange pages than purple pages.
#### 890