It's 1.38.
You need to add the decimal places, and you get three. Since 0.92 doesn't have a front, you only go two decimal places to the right. Don't quote me on this, though.
Remove the decimal place for 1.5 to 15. 15 x 0.92 = 13.8. Move one to the left, and you get 1.38.
When you have numbers like 1.5 x 2.3, just remove the decimal places, write down how far they are from the dot (one for both in this example) and add those. You get two. Do 15 * 23 and you get 345. This goes two decimal places to the left, getting 3.45.
Hope this helps.
