To simplify this, we can first multiply 2.25 by 4. That's because multiplying them will get rid of the decimal points in 2.25, and will make the nice, round number of 9. Like said earlier, 2.25 * 4 is 9 (you can figure this out by multiplying each of the individual parts of 2.25 by 4, and then adding them. 2 * 4 is 8, .2 * 4 is .8, and .5 * 4 is .2, 8 + .8 + .2 is 9.) Now, we have to multiply 9 and 23. 9 * 23 is 207, so the answer to this question is 207.