0.001 -> small.num #Store the number 0.0001 under the name "small.num" (i.e. put 0.0001 into small.num)
big.num <- 10 * 100 #You can put the name first if you reverse the arrow (set big.num to 10000).
big.num+small.num+1 #Now you can treat big.num and small.num as numbers, and use them in calculations
my.result <- big.num+small.num+2 #And you can store the result of any calculation
my.result #To look at the stored object, just type its name
pi #There are some named objects that R provides for you