I am, shall we say, math challenged but need to figure something out.

If there is a stone sample emitting 112 nanograys of absorbed radiation dose per hour per kilo gram of sample and I want to convert it to grays, I have to first figure out what a nano is.

I understand a nano is .000 000 001 so a nano gray is one billionth of a gray.

This is what I think is the right way to do the math.

1200# of sample x .453 = 543.6 Kilograms of sample x 112 nGy =

60,883.2 nGy/hr x 24 hours = 1,461,196.8 nGy per day or 1.461 Gray per day

or did I miss a few decimal poins there? Is it 1.461 or is it .1461?

1.461 Gray x 365 days = 533.265 Grays per year emitted from 1200# of sample?

Thanking the math Wizards in advance....