Generate a random number using a previously generated random number?

Hey there! I am trying to generate a set of random numbers in a survey. I am using the embedded data so that I can store the random numbers because I will need them for analysis. I generate the first one as follows:

Number1 = ${rand://float/0:50}

And I am embedding this number into a question. Then I want to ask a question that calls a random number in the range of 0 to Number1. Something like this:

Number2 = ${rand://float/0:${e://Field/Number1}}

but all I get out when I call Number2 is '}'

Any thoughts? Thanks!